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You are invited to play a game in which you roll two fair dice. If you roll a 9, you win $5.00. If you roll any other number, you lose the $1.00 it costs to play. What is the expected value for this game (in dollars)? (Round your answer to the nearest cent. Use − to indicate sign. For example, use 1 for +1 and −1 for − 1. Do not raise the sign.)

Answers

Answer 1

To find the expected value for this game (in dollars), we need to determine the probability of winning or losing as well as the amount of money gained or lost in each scenario. We can use this information to calculate the expected value using the following formula: Expected value = (probability of winning × amount won) + (probability of losing × amount lost) .

The first step is to determine the probability of rolling a 9. Since there are 36 possible outcomes (6 possible outcomes on the first die and 6 possible outcomes on the second die), we can use the following probability: Probability of rolling a 9 = number of ways to roll a 9 ÷ total number of out comes/

Number of ways to roll a 9 = 4 (since there are 4 ways to roll a 9: 3 and 6, 4 and 5, 5 and 4, and 6 and 3)

Total number of outcomes = 36

Therefore,

Probability of rolling a 9 = 4/36 = 1/9 Next, we need to determine the probability of rolling any other number. Since there are 36 possible outcomes and only 4 ways to roll a 9, there are 32 ways to roll any other number. Therefore, Probability of rolling any other number = number of ways to roll any other number ÷ total number of out comes Number of ways to roll any other number = 32

Total number of outcomes = 36

Therefore,

Probability of rolling any other number = 32/36

= 8/9Now that we have the probabilities,

we can calculate the expected value: Expected value = (probability of winning × amount won) + (probability of losing × amount lost)

Expected value = (1/9 × $5.00) + (8/9 × −$1.00)

Expected value = $0.56

Therefore,

the expected value for this game is $0.56 (rounded to the nearest cent).

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Related Questions

A c-bar chart shows the percent of the production that is defective.
Group of answer choices
A) true
B) false

Answers

The correct option is B. The statement "A c-bar chart shows the percent of the production that is defective" is False.

A c-bar chart is used to represent how many items in a dataset fall into different categories. It represents the frequency or percentage of data in each category on a single graph.

These charts are used to depict nominal data, which is data that is grouped into distinct categories. In this way, the c-bar chart represents the number or percentage of items in each category that exist in the data set.

However, c-bar charts are not used to show the percent of the production that is defective.

They show the frequency or count of items in each category, but they do not typically include information about the overall production.

Therefore, the statement "A c-bar chart shows the percent of the production that is defective" is False.

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Does the population mean rings score depend on the age of the gymnast? Consider the three age groups: 11-13, 14-16, and 17-19. Use the results from the 2007, 2011, and 2015 Individual Male All-Around Finals as sample data. a) Perform at the 10% significance level the one-way ANOVA test to compare the population mean rings scores for each of the three age groups assuming that all of the requirements are met. Should we reject or not reject the claim that there is no difference in population mean scores between the age groups? b) Provide a possible explanation for the difference you did or did not observe in mean scores between the age groups in part a)

Answers

To perform the one-way ANOVA test, we compare the population mean rings scores for each of the three age groups: 11-13, 14-16, and 17-19, using the results from the 2007, 2011, and 2015 Individual Male All-Around Finals as sample data.

The one-way ANOVA test allows us to determine if there is a statistically significant difference in the mean scores between the age groups.

Assuming that all the requirements for the test are met, we calculate the F-statistic and compare it to the critical value at the 10% significance level. If the calculated F-statistic is greater than the critical value, we reject the claim that there is no difference in population mean scores between the age groups. Otherwise, we fail to reject the claim.

b) The possible explanation for the observed difference, if we reject the claim, could be attributed to several factors. Gymnasts in different age groups might have varying levels of physical development, strength, and maturity, which could affect their performance on the rings apparatus. Older gymnasts might have had more training and experience, giving them an advantage over younger gymnasts. Additionally, there could be differences in coaching styles, training methods, and competitive experience across the age groups, which could contribute to variations in performance. Other factors like genetics, individual talent, and dedication to training could also play a role in the observed differences in mean scores.

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15. If you have samples of n1 = 14 and n2 = 12, in performing the pooled-variance t test; how many degrees of freedom do you have? You have degrees of freedom.

Answers

The degrees of freedom for the pooled-variance t test in this case is 24.

In the pooled-variance t test, the degrees of freedom represent the number of independent pieces of information available to estimate the population parameters. To calculate the degrees of freedom, we use the formula (n₁ - 1) + (n₂ - 1), where n₁ and n₂ are the sample sizes of the two groups being compared.

In this case, we have n₁ = 14 and n₂ = 12. Plugging these values into the formula, we get:

df = (14 - 1) + (12 - 1)

df = 13 + 11

df = 24

Therefore, we have 24 degrees of freedom for the pooled-variance t test.

The degrees of freedom are important because they determine the critical value from the t-distribution table, which is used to determine the statistical significance of the test. The larger the degrees of freedom, the closer the t-distribution approximates the standard normal distribution.

Having a higher degrees of freedom allows for a more precise estimation of the population parameters, reducing the potential bias in the results. It provides more information for the test to make reliable inferences about the population based on the sample data.

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Evaluate the integral: 3 ft t² et du dt

Answers

To evaluate the integral ∫∫ 3ft t² e^t du dt, we'll use the technique of multiple integration, starting with the inner integral and then evaluating the outer integral.

First, let's integrate with respect to u: ∫ 3ft t² e^t du = 3ft t² e^t u + C₁. Here, C₁ represents the constant of integration with respect to u. Now, we can integrate the above expression with respect to t: ∫ [a,b] (3ft t² e^t u + C₁) dt. Integrating term by term, we get: = ∫ [a,b] 3ft³ e^t u + C₁t² dt = [3ft³ e^t u/4 + C₁t³/3] evaluated from a to b = (3fb³ e^b u/4 + C₁b³/3) - (3fa³ e^a u/4 + C₁a³/3). This gives us the final result of the integral.

The limits of integration [a, b] need to be provided to obtain the specific numerical value of the integral.

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Consider the sample 68, 50, 66, 67, 52, 78, 74, 45, 63, 51, 62 from a normal population with population mean μ and population variance σ2. Find the 95% confidence interval for μ.
Please choose the best answer.
a)
61.45±7.14
b)
61.45±8.24
c)
61.45±4.67
d)
61.45±1.53
e)
61.45±3.55

Answers

The 95% confidence interval for the population mean is 61.45 ± 8.24 or (53.21, 69.69)

The given problem requires the determination of the 95% confidence interval for the population mean based on a sample of 11 data items from a normal population. We can use the formula below to find the 95% confidence interval for the population mean, given that the sample size is less than 30:

CI = X ± tS/√n, where X is the sample mean, S is the sample standard deviation, n is the sample size, and t is the critical value obtained from the t-distribution table, with a degree of freedom of n - 1, and with a level of confidence of 95%. We will have the following steps to solve the given problem:

Calculate the sample mean X. Calculate the sample standard deviation S. Determine the critical value t from the t-distribution table using the degrees of freedom (df) = n - 1 and confidence level = 95%.

Calculate the lower limit and upper limit of the 95% confidence interval using the formula above. Plug in the X, t, and S values in the formula above to obtain the final answer. The sample data are:

68, 50, 66, 67, 52, 78, 74, 45, 63, 51, 62.

To find the sample mean X, we sum up all the data and divide by the number of data, which is n = 11.

X = (68 + 50 + 66 + 67 + 52 + 78 + 74 + 45 + 63 + 51 + 62)/11

X = 61.45

To find the sample standard deviation S, we use the formula below:

S = √Σ(X - X)²/(n - 1), where X is the sample mean, and Σ is the sum of all the squared deviations from the mean.

S = √[(68 - 61.45)² + (50 - 61.45)² + (66 - 61.45)² + (67 - 61.45)² + (52 - 61.45)² + (78 - 61.45)² + (74 - 61.45)² + (45 - 61.45)² + (63 - 61.45)² + (51 - 61.45)² + (62 - 61.45)²]/(11 - 1)

= 9.28

The degrees of freedom df = n - 1 = 11 - 1 = 10.

Using a t-distribution table with df = 10 and confidence level = 95%, we find the critical value t = 2.228.

The 95% confidence interval for the population mean is:

CI = X ± tS/√nCI

= 61.45 ± 2.228(9.28)/√11CI

= 61.45 ± 8.24

Therefore, the 95% confidence interval for the population mean is 61.45 ± 8.24 or (53.21, 69.69). Thus, the correct option is (b) 61.45±8.24.

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Open StatCrunch to answerer the following questions: The mean GPA of all college students is 2.95 with a standard deviation of 1.25. What is the probability that a single MUW student has a GPA greater than 3.0 ? (Round to four decimal places) What is the probability that 50 MUW students have a mean GPA greater than 3.0 ? (Round to four decial palces)

Answers

The probability that a single MUW student has a GPA greater than 3.0 is 0.4880.

The probability that 50 MUW students have a mean GPA greater than 3.0 is 0.3897.

To calculate the probability of GPA greater than 3.0 for a single MUW student, the formula for z-score is used.

z= (x - μ) / σ

where x = 3.0, (mean) μ = 2.95, and (standard deviation) σ = 1.25

The calculation gives us:

z = (3 - 2.95) / 1.25

= 0.04 / 1.25 = 0.032

Using the Z-table, we can determine the probability associated with the z-score. The area in the Z-table is for values to the left of the z-score. To obtain the area for the z-score in the question, we subtract the table area from 1.

P(Z > z) = 1 - P(Z < z)

= 1 - 0.5120 = 0.4880

Thus, the probability of a single MUW student having a GPA greater than 3.0 is 0.4880.

For the probability of 50 MUW students having a mean GPA greater than 3.0, we apply the central limit theorem since the sample size is greater than 30.

μx = μ = 2.95σx = σ/√n = 1.25/√50 = 0.1777

The formula for z-score is then used as follows:

z= (x - μx) / σx

The calculation gives us:

z= (3 - 2.95) / 0.1777

= 0.05 / 0.1777 = 0.2811

Using the Z-table, we can determine the probability associated with the z-score. The area in the Z-table is for values to the left of the z-score. To obtain the area for the z-score in the question, we subtract the table area from 1.

P(Z > z) = 1 - P(Z < z)

= 1 - 0.6103 = 0.3897.

Thus, the probability that 50 MUW students have a mean GPA greater than 3.0 is 0.3897.

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[[1² (xy + yz + xz)dV = {(x, y, z) | 0 ≤ x ≤ 3, 0 ≤ y ≤ 8,0 ≤ z ≤ 1} . Evaluate B

Answers

The value of B is 6. the triple integral in the question can be evaluated by repeated integration.

First, we integrate with respect to x, holding y and z constant. This gives us the following:

B = ∫_0^1 ∫_0^8 ∫_0^3 (xy + yz + xz) dx dy dz

We can now integrate with respect to y, holding z constant. This gives us the following:

B = ∫_0^1 ∫_0^3 (x^2y + y^2z + xzy) dz dy

Finally, we integrate with respect to z, which gives us the following:

B = ∫_0^1 (x^2y + xy^2 + xyz) dy

We can now evaluate this integral by plugging in the limits of integration. We get the following:

B = (3^2 * 8 + 8 * 8^2 + 3 * 8 * 8) / 2

= 6

Therefore, the value of B is 6.

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Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56 hours and a standard deviation of 3.2 hours. With this information, answer the following questions. (a) What proportion of light bulbs will last more than 62 hours? (b) What proportion of light bulbs will last 51 hours or less? (c) What proportion of light bulbs will last between 58 and 61 hours? (d) What is the probability that a randomly selected light bulb lasts less than 46 hours?

Answers

The probability that a randomly selected light bulb lasts less than 46 hours is 0.1%.

The lifetimes of light bulbs are approximately normally distributed, with a mean of 56 hours and a standard deviation of 3.2 hours. Using this information, we will calculate the proportion of light bulbs that will last more than 62 hours, the proportion of light bulbs that will last 51 hours or less, the proportion of light bulbs that will last between 58 and 61 hours, and the probability that a randomly selected light bulb lasts less than 46 hours. (a) What proportion of light bulbs will last more than 62 hours?z = (x - μ) / σz = (62 - 56) / 3.2 = 1.875From the standard normal distribution table, the proportion of light bulbs that will last more than 62 hours is 0.0301 or 3.01%.Therefore, 3.01% of light bulbs will last more than 62 hours. (b) What proportion of light bulbs will last 51 hours or less?z = (x - μ) / σz = (51 - 56) / 3.2 = -1.5625From the standard normal distribution table, the proportion of light bulbs that will last 51 hours or less is 0.0594 or 5.94%.Therefore, 5.94% of light bulbs will last 51 hours or less. (c) What proportion of light bulbs will last between 58 and 61 hours?z1 = (x1 - μ) / σz1 = (58 - 56) / 3.2 = 0.625z2 = (x2 - μ) / σz2 = (61 - 56) / 3.2 = 1.5625From the standard normal distribution table, the proportion of light bulbs that will last between 58 and 61 hours is the difference between the areas to the left of z2 and z1, which is 0.1371 - 0.2660 = 0.1289 or 12.89%.Therefore, 12.89% of light bulbs will last between 58 and 61 hours. (d) What is the probability that a randomly selected light bulb lasts less than 46 hours?z = (x - μ) / σz = (46 - 56) / 3.2 = -3.125From the standard normal distribution table, the proportion of light bulbs that will last less than 46 hours is 0.0010 or 0.1%.

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Find the indicated probability. Round to three decimal places. A car insurance company has determined that 6% of all drivers were involved in a car accident last year. Among the 11 drivers living on one particular street, 3 were involved in a car accident last year. If 11 drivers are randomly selected, what is the probability of getting 3 or more who were involved in a car accident last year? O 0.531 0.978 O 0.02 0.025

Answers

The probability of randomly selecting 3 or more drivers out of 11 on a particular street who were involved in a car accident last year is approximately 0.025.

In a binomial distribution, the probability of success (being involved in a car accident) is denoted by p, and the number of trials (drivers selected) is denoted by n. In this case, p = 0.06 and n = 11.

To find the probability of getting 3 or more drivers who were involved in a car accident, we need to calculate the probabilities for each possible outcome (3, 4, 5, ..., 11) and sum them up.

Using the binomial probability formula, the probability of exactly x successes out of n trials is given by P(X = x) = C(n, x) * p^x * (1-p)^(n-x), where C(n, x) represents the binomial coefficient.

Calculating the probabilities for x = 3, 4, 5, ..., 11 and summing them up, we find that the probability of getting 3 or more drivers involved in a car accident is approximately 0.978, rounded to three decimal places.

Therefore, the correct answer is 0.978.

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Assume that there are two continuous random variables X and Y where the values of each one of them is negative. It is known that the covariance of X and Y is -2. Also it is known that the expected values of X, Y, (YX) are the same. Determine the expected value of (1-Y)(1-X)
a) 0
b) 1
c) -2
d) -1
e) 2

Answers

Answer:

The expected value of two continuous variables are answer is (d) -1.

Let's denote the expected value of a random variable X as E(X).

Given that the expected values of X, Y, and (YX) are the same, we can represent this as:

E(X) = E(Y) = E(YX)

The expected value of a product of two random variables can be written as:

E(XY) = E(X) * E(Y) + Cov(X, Y)

Since the covariance of X and Y is -2, we have:

E(XY) = E(X) * E(Y) - 2

Now, let's calculate the expected value of (1-Y)(1-X):

E[(1-Y)(1-X)] = E(1 - X - Y + XY)

= E(1) - E(X) - E(Y) + E(XY)

= 1 - E(X) - E(Y) + E(X) * E(Y) - 2

= 1 - 2E(X) + (E(X))^2 - 2

We know that E(X) = E(Y), so let's substitute E(Y) with E(X):

E[(1-Y)(1-X)] = 1 - 2E(X) + (E(X))^2 - 2

= 1 - 2E(X) + (E(X))^2 - 2

= 1 - 2E(X) + (E(X))^2 - 2

= (1 - E(X))^2 - 1

Since we are given that X and Y are negative variables, it means that their expected values are also negative. Therefore, E(X) < 0, and (1 - E(X))^2 is positive.

Based on the above equation, we can see that the expected value of (1-Y)(1-X) is always negative, regardless of the specific values of E(X) and E(Y).

Therefore, the answer is (d) -1.

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The expected value of two continuous variables are answer is (d) -1.

Let's denote the expected value of a random variable X as E(X).

Given that the expected values of X, Y, and (YX) are the same, we can represent this as:

E(X) = E(Y) = E(YX)

The expected value of a product of two random variables can be written as:

E(XY) = E(X) * E(Y) + Cov(X, Y)

Since the covariance of X and Y is -2, we have:

E(XY) = E(X) * E(Y) - 2

Now, let's calculate the expected value of (1-Y)(1-X):

E[(1-Y)(1-X)] = E(1 - X - Y + XY)

= E(1) - E(X) - E(Y) + E(XY)

= 1 - E(X) - E(Y) + E(X) * E(Y) - 2

= 1 - 2E(X) + (E(X))^2 - 2

We know that E(X) = E(Y), so let's substitute E(Y) with E(X):

E[(1-Y)(1-X)] = 1 - 2E(X) + (E(X))^2 - 2

= 1 - 2E(X) + (E(X))^2 - 2

= 1 - 2E(X) + (E(X))^2 - 2

= (1 - E(X))^2 - 1

Since we are given that X and Y are negative variables, it means that their expected values are also negative. Therefore, E(X) < 0, and (1 - E(X))^2 is positive.

Based on the above equation, we can see that the expected value of (1-Y)(1-X) is always negative, regardless of the specific values of E(X) and E(Y).

Therefore, the answer is (d) -1.

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A hospital manager claims that the average number of infections per week at the hospital is 16.3. A random sample of 32 weeks had a mean number of 15.9 infections. The sample standard deviation is 1.8. Perform a 1-sample test for population means at an α of 0.05 to determine if the hospital manager's claim is false.
The p value for this 2-tailed test is 0.22. We reject the hospital manager's claim.
The p value for this 1-tailed test is 0.11. We reject the hospital manager's claim.
The p value for this 1-tailed test is 0.11. We fail to reject the hospital manager's claim.
The p value for this 2-tailed test is 0.22. We fail to reject the hospital manager's claim.

Answers

The p-value is greater than t value and we can reject the null hypothesis for a 2-tailed test. Thus, option D is correct.

Population mean = 16.3

Sample mean (X) = 15.9

Sample standard deviation = 1.8

Sample size = 32

Significance level = 0.05

The null hypothesis is equal to claimed value.

H0 = μ = 16.3

The alternative hypothesis is not equal to claimed value.

Ha =  μ ≠ 16.3

The formula used to test the sample is:

t = (X - μ) / [tex](s / \sqrt{n} )[/tex]

t = (15.9 - 16.3) / [tex](1.8 / \sqrt{32} )[/tex]

t = -0.223

The p-value is greater than H0, so we can reject the null hypothesis.

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The complete question is:

A hospital manager claims that the average number of infections per week at the hospital is 16.3. A random sample of 32 weeks had a mean number of 15.9 infections. The sample standard deviation is 1.8. Perform a 1-sample test for population means at an α of 0.05 to determine if the hospital manager's claim is false.

a. The p-value for this 2-tailed test is 0.22. We reject the hospital manager's claim.

b. The p-value for this 1-tailed test is 0.11. We reject the hospital manager's claim.

c. The p-value for this 1-tailed test is 0.11. We fail to reject the hospital manager's claim.

d. The p-value for this 2-tailed test is 0.22. We fail to reject the hospital manager's claim.

The value of sinx is given. Find tanx and cosx if x lies in the specified interval. sin x = 7/25, x ∈ [π/2, π]
tan x = __

Answers

For the given interval x ∈ [π/2, π] and sin(x) = 7/25, we have cos(x) = -24/25 and tan(x) = -7/24.

To find the values of tan(x) and cos(x) when sin(x) = 7/25 and x lies in the interval [π/2, π], we can use the relationship between trigonometric functions.

Given: sin(x) = 7/25

We can determine cos(x) using the Pythagorean identity: sin²(x) + cos²(x) = 1.

sin²(x) = (7/25)² = 49/625

cos²(x) = 1 - sin²(x) = 1 - 49/625 = 576/625

Taking the square root of both sides, we find:

cos(x) = ± √(576/625) = ± (24/25)

Since x lies in the interval [π/2, π], cos(x) is negative in this interval.

Therefore, cos(x) = -24/25.

To find tan(x), we can use the identity: tan(x) = sin(x) / cos(x).

tan(x) = (7/25) / (-24/25) = -7/24.

Therefore, tan(x) = -7/24.

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The area of a rectangular field is 7 1/3 sq.m. Also, the breadth of the field is 2 3/4m. Find the length of the field. (with steps)

Answers

The length of the rectangular field is 2 2/3 meters.

To find the length of the rectangular field, we can use the formula for the area of a rectangle:

Area = Length × Breadth.

Area of the field = 7 1/3 sq.m

Breadth of the field = 2 3/4 m

Convert the mixed numbers to improper fractions.

7 1/3 = (7 × 3 + 1) / 3 = 22/3

2 3/4 = (2 × 4 + 3) / 4 = 11/4

Substitute the values into the area formula.

22/3 = Length × 11/4

Solve for Length.

To isolate Length, we need to get it alone on one side of the equation. We can do this by multiplying both sides of the equation by the reciprocal of 11/4, which is 4/11.

(22/3) × (4/11) = Length × (11/4) × (4/11)

After simplifying:

(22/3) × (4/11) = Length

8/3 = Length

Convert the length to a mixed number.

8/3 = 2 2/3

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The mayor is interested in finding a 90% confidence interval for the mean number of pounds of trash per person per week that is generated in the city. The study included 156 residents whose mean number of pounds of trash generated per person per week was 36.7 pounds and the standard deviation was 7.9 pounds. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a distribution. b. With 90% confidence the population mean number of pounds per person per week is between and pounds

Answers

a. To compute the 90% confidence interval for the mean number of pounds of trash per person per week generated in the city, we can use the t-distribution.

b. With 90% confidence, the population mean number of pounds per person per week is between 35.535 pounds and 37.865 pounds.

a. To compute the confidence interval, we'll use the formula:

Confidence Interval = sample mean ± (critical value) * (standard deviation / sqrt(sample size))

Since the sample size is large (n > 30), we can approximate the critical value using the standard normal distribution. For a 90% confidence level, the critical value is approximately 1.645.

Plugging in the values, the confidence interval is:

36.7 ± 1.645 * (7.9 / sqrt(156)) = 36.7 ± 1.645 * 0.633 = 36.7 ± 1.041

Rounding to three decimal places, the confidence interval is (35.659, 37.741).

b. With 90% confidence, we can state that the population mean number of pounds per person per week is between 35.535 pounds and 37.865 pounds.

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Given μ=25 and σ=4.8, what would be the x-value for the ninety-fifth percentile?

Answers

The x-value for the ninety-fifth percentile is approximately 32.896

To find the x-value for the ninety-fifth percentile, we can use the standard normal distribution table or a calculator with the cumulative distribution function (CDF) for the normal distribution.

The cumulative distribution function gives us the probability that a random variable X is less than or equal to a given value x. In this case, we want to find the x-value for which the cumulative probability is 0.95 (95th percentile).

Using the standard normal distribution table, we can look up the z-score corresponding to a cumulative probability of 0.95. The z-score is the number of standard deviations away from the mean.

Since the standard normal distribution has a mean of 0 and a standard deviation of 1, we can find the z-score using the formula:

z = (x - μ) / σ

Substituting the given values, we have:

z = (x - 25) / 4.8

Now, looking up the z-score of 1.645 in the standard normal distribution table, we find that the corresponding cumulative probability is approximately 0.95.

Solving the equation for x, we have:

1.645 = (x - 25) / 4.8

Multiplying both sides by 4.8, we get:

7.896 = x - 25

Adding 25 to both sides, we find:

x = 32.896

Therefore, the x-value for the ninety-fifth percentile is approximately 32.896.

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Describe a specific, exercise science-related scenario where a One-Way Independent Groups AN OVA would be the only
appropriate test to use. You must include your null and alternative hypotheses in terms specific to your scenario, but do not
perform the statistical test itself. To receive full credit on this question, you must describe the situation with enough detail to
determine that this test is the only correct choice (Hint: think of Sections 1 and 2 from SPSS8). You must come up with your dau
example; those taken directly from the textbook or notes will not receive credit.

Answers

The One-Way Independent Groups ANOVA (Analysis of Variance) is a test used to determine if there is a significant difference between means of three or more independent groups. It uses the F-ratio to test these hypotheses. In exercise science, it is the only appropriate test for testing the effect of three different pre-workout supplements on muscular endurance.

The One-Way Independent Groups ANOVA (Analysis of Variance) is a test used to determine whether or not there is a significant difference between the means of three or more independent groups. The null hypothesis assumes that the means of all groups are equal while the alternative hypothesis assumes that at least one of the groups has a different mean than the others.

The F-ratio is used to test these hypotheses. A specific, exercise science-related scenario where a One-Way Independent Groups ANOVA would be the only appropriate test to use is when testing the effect of three different types of pre-workout supplements on muscular endurance. Three groups of participants are given different pre-workout supplements for four weeks. After four weeks, each participant completes a muscular endurance test consisting of a series of exercises, and the number of repetitions is recorded. The null hypothesis would be that there is no significant difference between the means of the three groups. The alternative hypothesis would be that at least one of the means is different from the others.

This test is the only correct choice because it is the only way to determine if there is a significant difference between the means of three or more independent groups. A t-test would not be appropriate because there are more than two groups being compared. Additionally, a paired t-test would not be appropriate because the groups are independent.

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Use the probability distribution below to answer
X 1 2 3 4 5 O 0.10 O 0.54 O 0.46 p(x) O 0.40 0.27 0.13 0.14 The probability of at least three, P (x > 4)), is 0.36 0.10

Answers

The probability of at least three (P(x > 4)) is 0.24. This means that there is a 24% chance of obtaining a value of 4 or 5 from the given probability distribution.

The probability distribution given provides the probabilities for the random variable X taking on values from 1 to 5. The probabilities for each value are listed as p(x). To find the probability of at least three (P(x > 4)), we need to determine the cumulative probability of values greater than 4.

To calculate the probability of at least three (P(x > 4)), we sum the probabilities of the values 4 and 5. From the given probability distribution, the probability of X being 4 is 0.14, and the probability of X being 5 is 0.10. By adding these two probabilities, we get 0.14 + 0.10 = 0.24.

Therefore, the probability of at least three (P(x > 4)) is 0.24. This means that there is a 24% chance of obtaining a value of 4 or 5 from the given probability distribution.

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A magazine provided results from a poll of 1500 adults who were asked to identify their favorite pie. Among the 1500 respondents, 11% chose chocolate pie, and the margin of error was given as ±3 percentage points. What values do p, q, n, E, and p represent? If the confidence level is 95%, what is the value of a? The value of p is The value of q is The value of n is The value of E is The value of p is If the confidence I α = (Type an i the population proportion. the sample size. the sample proportion. the margin of error. found from evaluating 1 - p.

Answers

The terms mentioned in the question are p, q, n, E, and a.

The values of each of these terms are given below: Value of p = 0.11 (proportion of adults who chose chocolate pie)Value of q = 1 - p = 1 - 0.11 = 0.89 (proportion of adults who did not choose chocolate pie)Value of n = 1500 (total sample size of adults who participated in the poll)Value of E = ±3 percentage points (margin of error)

Now, we need to find the value of a at 95% confidence level.

[tex]To find the value of a, we can use the formula: a = 1 - (confidence level/100)% = 1 - 95/100 = 0.05[/tex]

Therefore, the value of a at 95% confidence level is 0.05.

Furthermore, as per the question, if the confidence level is α, then the value of E can be found by evaluating 1 - p.

The correct option is found from evaluating 1 - p.

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1-Increasing N, increases the real effect of the independent variable.
Select one:
True
False ?
2-If H0 is false, a high level of power increases the probability we will reject it.
Select one:
True
False
3-Which of the following most clearly differentiates a factorial ANOVA from a simple ANOVA?
Select one:
a.An interaction effect
b.Two main effects
c.Two independent variables
d.All of the above

Answers

1-Increasing N, increases the real effect of the independent variable.

=> False.

2-If H0 is false, a high level of power increases the probability we will reject it. => True.

3-Which of the following most clearly differentiates a factorial ANOVA from a simple ANOVA.

=> An interaction effect, Two main effects, Two independent variables.

Here, we have,

given that,

1-Increasing N, increases the real effect of the independent variable.

2-If H0 is false, a high level of power increases the probability we will reject it.

3-Which of the following most clearly differentiates a factorial ANOVA from a simple ANOVA.

now, we know that,

A real effect of the independent variable is defined as any effect that produces a change in the dependent variable.

Increasing N affects the magnitude of the effect of the independent variable. Using sample data, it is impossible to prove with certainty that H0 is true. Generally speaking, if the sampling distribution of a statistic is indeterminate (impossible to determine), the statistic cannot be used for inference.

As the sample size increases, the probability of a Type II error (given a false null hypothesis) decreases, but the maximum probability of a Type Ierror (given a true null hypothesis) remains alpha by definition.

The probability of committing a type II error is equal to one minus the power of the test, also known as beta. The power of the test could be increased by increasing the sample size, which decreases the risk of committing a type II error.

The independent variable (IV) is the characteristic of a psychology experiment that is manipulated or changed by researchers, not by other variables in the experiment.For example, in an experiment looking at the effects of studying on test scores, studying would be the independent variable. Researchers are trying to determine if changes to the independent variable (studying) result in significant changes to the dependent variable (the test results).

so, we get,

1. False

2. True

3. d. All of the above.

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Quickly just answer
1) Determine \( \vec{a} \cdot \vec{b} \) if \( \|\vec{a}\|=6,\|\vec{b}\|=4 \) and the angle between the vectors \( \theta=\frac{\pi}{3} \) ? A) 24 B) \( -12 \) C) 12 D) None of the above 2) If \( \vec

Answers

1) The dot product of vectors [tex]\( \vec{a} \)[/tex] and [tex]\( \vec{b} \)[/tex] is 12.

The dot product of two vectors [tex]\( \vec{a} \) and \( \vec{b} \)[/tex] is given by the formula[tex]\( \vec{a} \cdot \vec{b} = \|\vec{a}\| \|\vec{b}\| \cos \theta \)[/tex], where [tex]\( \|\vec{a}\| \)[/tex]represents the magnitude of vector [tex]\( \vec{a} \), \( \|\vec{b}\| \)[/tex] represents the magnitude of vector [tex]\( \vec{b} \), and \( \theta \)[/tex] represents the angle between the two vectors.

In this case,[tex]\( \|\vec{a}\| = 6 \), \( \|\vec{b}\| = 4 \), and \( \theta = \frac{\pi}{3} \)[/tex]. Plugging these values into the formula, we get:

[tex]\( \vec{a} \cdot \vec{b} = 6 \times 4 \cos \frac{\pi}{3} \)[/tex]

Simplifying further:

[tex]\( \vec{a} \cdot \vec{b} = 24 \cos \frac{\pi}{3} \)[/tex]

The value of [tex]\( \cos \frac{\pi}{3} \) is \( \frac{1}{2} \)[/tex], so we can substitute it in:

[tex]\( \vec{a} \cdot \vec{b} = 24 \times \frac{1}{2} = 12 \)[/tex]

Therefore, the dot product of vectors [tex]\( \vec{a} \) and \( \vec{b} \)[/tex] is 12.

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Darius is draining his pool for resurfacing. The pool began with 13,650 gallons of water and it is draining a a rate of 640 gallonsperhour. There are currently 8,370 gallons in the pool. How long has Darius been draining the pool?

Answers

Darius has been draining the pool for approximately 8.25 hours.

To find how long Darius has been draining the pool, we need to calculate the time it takes to drain the difference between the initial volume and the current volume at the given draining rate.

Initial volume = 13,650 gallons

Current volume = 8,370 gallons

Draining rate = 640 gallons per hour

Volume drained = Initial volume - Current volume

= 13,650 gallons - 8,370 gallons

= 5,280 gallons

To calculate the time taken to drain this volume, we can use the formula: Time = Volume / Rate

= 5,280 gallons / 640 gallons per hour

Time ≈ 8.25 hours

Therefore, Darius has been draining the pool for approximately 8.25 hours.

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If you use a 0.05 kevel of significance in a two-tal hypothesis lest, what decisice will you make if Zstar =−1,52 ? Cick here to view page 2 of the cumulative standard teed nomal distrecion table. Determine the decision rule. Select the correct choise below and fir in the answer boa(es) within your choice. (Round to two decimal places as needed.) A. Reject H6​ it Z5 sat ​<− B. Reject H0​ if ZSTAT ​<− or Z8TAT​>+ C. Reject H6​ it ZSTat ​> D. Reject bo

Answers

The correct choice is: A. Reject H0 if Zstat < -Z*

To determine the decision made in a two-tailed hypothesis test with a significance level of 0.05, we need to compare the critical value (Z*) with the test statistic (Zstat).

In this case, Z* is given as -1.52.

The decision rule for a two-tailed test with a significance level of 0.05 is as follows:

Reject H0 (null hypothesis) if Zstat < -Z* or Zstat > Z*

Since the given Zstat is -1.52, we need to compare it with -Z* and Z*.

If -1.52 is less than -Z* (which is the negative value of the critical value from the standard normal distribution table), then we reject H0.

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5: Consider the annual earnings of 300 workers at a factory. The mode is $25,000 and occurs 150 times out of 301. The median is $50,000 and the mean is $47,500. What would be the best measure of the "center"?
6. explain your answer from question 5

Answers

5. In the given scenario, we have;Mode = $25,000 Median = $50,000Mean = $47,500As there are different measures of central tendency, the best measure of the center would be the median.6.                

Explanation of the answer:In statistics, the central tendency is the way of defining a single value that characterizes the whole set of data. This central tendency can be measured using different statistical measures such as mean, mode, median, etc.The given data represents the annual earnings of 300 workers at a factory. We are given that the mode is $25,000 and occurs 150 times out of 301, the median is $50,000, and the mean is $47,500.The mode is the value that occurs the most number of times in a data set. In this case, the mode is $25,000 and it occurs 150 times out of 301, which is less than half of the data. Therefore, the mode is not the best measure of center in this case.The mean is the sum of all the values in a data set divided by the number of values. The mean is sensitive to outliers, so if there are extreme values in the data set, the mean will be affected. The mean for this data set is $47,500.The median is the value in the middle of a data set. It is not affected by outliers, so it gives a better measure of central tendency than the mean. The median for this data set is $50,000, which is the best measure of center.  

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We asked 51 people to report the number of cars theyve ever owned. The results are a mean of 3.7 and a standard deviation of 1.4. Construct a 80% confidence interval Give your answers to two decimal places

Answers

80% confidence interval is (3.45, 3.95).

Here, we have,

given that,

We asked 51 people to report the number of cars theyve ever owned.

The results are a mean of 3.7 and a standard deviation of 1.4.

Construct a 80% confidence interval

so, we get,

x = 3.7

s = 1.4

n = 51

now, we have,

the critical value for α = 0.2 and df = 50 is:

t_c = 1.282

so, we get,

80% confidence interval = x ± t_c× s/√n

substituting the values, we have,

80% confidence interval = 3.7 ± 0.2513

                                         = (3.449, 3.951)

                                         =(3.45, 3.95)

Hence, 80% confidence interval is (3.45, 3.95).

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The director of research and development is testing a new drug. She wants to know if there is evidence at the 0.0250.025 level that the drug stays in the system for more than 366366 minutes. For a sample of 1212 patients, the mean time the drug stayed in the system was 374374 minutes with a variance of 484484. Assume the population distribution is approximately normal.
Step 1 of 5: State the null and alternative hypotheses. H0: Ha: Step
2 of 5: Find the value of the test statistic. Round your answer to three decimal places.
Step 3 of 5: Specify if the test is one-tailed or two-tailed Step
4 of 5: Determine the decision rule for rejecting the null hypothesis. Round your answer to three decimal places.
Step 5 of 5: Make the decision to reject or fail to reject the null hypothesis

Answers

Answer: 2031

Step-by-step explanation: because by subing to biggieboy57 on yt to make the kids subs score go up

REVENUE FUNCTION The cell phone company decides that it doesn't want just to produce the phones. It would also the to sel hem The company decides to charge a price of $809 per Now let's construct a revenue function. For revenue functions, we relate the revenus the amount of money brings in without regard to how much the company pays in costs) to the quantity of ens produced of to In this case, the independent vanable will egen be the quantity of cell phones q We will use represent revenue So we have quanty (ell phones) Ris) revenue (dole) Fint determine t te the company Reed the Nowdeneyecept of the manus function. The intercept here would be t the revenue functon Hewsoce would be the amount the revenue in every Put the ther Knowing these and yintercept, find a formula for the revenue funcion Ether Re Do not include dolar signs in the answer should be the only variable in the an New use the function to find the revenue when the company sats 514 cell phones The company's would be $ neemed f Do not include a dollar sign in the ande if necessary round to two decal places Finally, the company's revenue for this month tolalled $546381, how many cell phones did it The company sold celphones Do not include dular sign in the ana necessary, und to two decimal places
REVENUE FUNCTION The cell phone company decides that it doesn't want just to produce the phones. It would also like to sell them. The company decides to charge a price of $899 per cell phone. Now, let's construct a revenue function. For revenue functions, we relate the revenue (the amount of money brings in, without regard to how much the company pays in costs) to the quantity of items produced. In this case, the independent variable will again be the quantity of cell phones, q. We will use R(q) instead of f(x) to represent revenue. So, we have q= quantity (cell phones) R(q) revenue (dollars)
First, determine the slope of the revenue function. Here, slope would be the amount the revenue increases every time the company sells another cell phone. Record the slope here. m = | Now, determine the y-intercept of the revenue function. The y-intercept here would be the revenue earned if no cell phones are sold. Put the y-intercept here. b= Knowing the slope and y-intercept, find a formula for the revenue function. Enter that here. R(q) = Do not include dollar signs in the answer. q should be the only variable in the answer. Now, use the function to find the revenue when the company sells 514 cell phones. The company's revenue would be $0 Do not include a dollar sign in the answer. If necessary, round to two decimal places. Finally, if the company's revenue for this month totalled $646381, how many cell phones did it sell? The company sold cell phones. Do not include a dollar sign in the answer. If necessary, round to two decimal places.

Answers

The company sold approximately 719 cell phones.

The slope of the revenue function is the price per cell phone, which is $899.

The y-intercept of the revenue function is 0, since if no cell phones are sold, the revenue will be zero.

Therefore, the formula for the revenue function is:

R(q) = 899q

To find the revenue when the company sells 514 cell phones, we plug in q=514 into the revenue function:

R(514) = 899(514) = $461,486

So, the company's revenue would be $461,486.

If the company's revenue for this month totaled $646,381, we can solve for q in the equation:

646,381 = 899q

q = 719.24

Therefore, the company sold approximately 719 cell phones.

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4. (11 points) A certain assignment has a mean of 80 points and a standard deviation of 5 points. Assume the assignment scores are normally distributed. A random sample of size n assignments is to be selected and the sample mean will be computed. (a) If n=1, what the probability the sample mean (in this case just the one item) is less than 82 ? Include the calculation of a z-score. (b) If n=9, what the probability the sample mean is is less than 82 ? Include the calculation of a z-score. (c) If n=49, what the probability the sample mean is is less than 82 ? Include the calculation of a z-score. (d) In one to three sentences, explain why the probabilities are following the pattern they do as the sample size increases in this context. 5. It is believed that the mean battery life of a certain phone is 12 hours. To test this, you randomly sample 25 phones and compute a sample mean of 11.7 hours with a sample standard deviation of 1.3 hours. (a) What do we need to assume about the population to make sure we can use the T Distribution? (b) Assuming the assumption you wrote in part (a) is true, what is the probability that you would observe a sample mean of 11.7 or smaller when the population mean is 12? Perform the entire calculation using R (including finding the value for t ). Provide your code as well as your final answer.

Answers

a) The probability that the sample mean is less than 82 can be obtained as 0.6554.

b) The probability is 0.8849

c) The probability is 0.9974

(a) If n=1, the probability that the sample mean (in this case just the one item) is less than 82 can be calculated using the z-score formula:

Z = (X - μ) / (σ / √n)

n=1, X=82, μ=80, and σ=5.

Plugging these values into the formula:

Z = (82 - 80) / (5 / √1) = 2 / 5 = 0.4

So, the probability that the sample mean is less than 82 can be obtained as 0.6554.

(b) If n=9, the probability that the sample mean is less than 82 can be calculated using the same approach as in part (a). Now, n=9, X=82, μ=80, and σ=5. Plugging these values into the formula:

Z = (82 - 80) / (5 / √9) = 2 / (5 / 3) = 2 * 3 / 5 = 1.2

So, the probability is 0.8849

(c) Now, n=49, X=82, μ=80, and σ=5. Plugging these values into the formula:

Z = (82 - 80) / (5 / √49) = 2 / (5 / 7) = 2 x 7 / 5 = 2.8

So, the probability is 0.9974

(d)  According to this theorem, as the sample size increases, the distribution of the sample mean approaches a normal distribution regardless of the shape of the population distribution.

Therefore, the probabilities become more predictable and closer to the probabilities calculated using the standard normal distribution. As n increases, the sample mean becomes a more reliable estimator of the population mean, resulting in a tighter and more concentrated distribution around the population mean.

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A defendant in a paternity suit was given a series of n independent blood tests, each of which excludes a wrongfully-accused man with probability Pk, where 1 ≤ k ≤n. If a defendant is not excluded by any of these tests, he is considered a serious suspect. If, however, a defendant is excluded by a least one of the tests, he is cleared. Find the probability, p, that a wrongfully-accused man will in fact be cleared by the series of tests.

Answers

Given that a defendant in a paternity suit was given a series of n independent blood tests, and each test excludes a wrongfully accused man with probability Pk, where 1 ≤ k ≤ n. If a defendant is not excluded by any of these tests, he is considered a serious suspect. If, however, a defendant is excluded by a least one of the tests, he is cleared.

To find: The probability, p, that a wrongfully accused man will, in fact, be cleared by the series of tests. Formula used: P (at least one) = 1 - P (none) = 1 - (1 - P1)(1 - P2)(1 - P3) ... (1 - Pn)Where P (at least one) is the probability that at least one test will exclude the accused; and P (none) is the probability that none of the tests will exclude the accused.A

nswer:

Step-by-step explanation: The probability of an innocent man being accused of paternity is P1, and the probability of this man being excluded by one test is (1 - P1).

The probability of this man being excluded by all the tests is given by

(1 - P1) (1 - P2) (1 - P3) ... (1 - Pn).

This means that the probability of this man being cleared by at least one test is:

P (at least one) = 1 - P (none)

= 1 - (1 - P1)(1 - P2)(1 - P3) ... (1 - Pn)

This is the probability that a wrongfully accused man will, in fact, be cleared by the series of tests.

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Question 13 Let X be a random variable whose probability density function is given fX(x)={e−2x+2e−x0 if x>0 otherwise (a) Write down the moment generating function for X. (b) Use this moment generating function to compute the first and second moments of X.

Answers

(a) The moment generating function for X is M(t) = (2e^(t))/(2-t) + (2e^(2t))/(4-2t).  (b) Using the moment generating function, we can differentiate M(t) to find the first and second moments of X by evaluating them at t = 0.

(a) The moment generating function (MGF) of a random variable X is defined as M(t) = E(e^(tX)), where E(.) denotes the expected value.

To find the MGF of X, we substitute the probability density function (PDF) of X into the MGF formula:

M(t) = E(e^(tX)) = ∫(e^(tx) * fX(x)) dx,

where fX(x) is the given PDF of X.

(b) To compute the moments of X using the MGF, we take derivatives of the MGF with respect to t and evaluate them at t = 0.

The first moment is obtained by differentiating the MGF once:

M'(t) = d/dt [M(t)],

and then evaluating at t = 0:

E(X) = M'(0).

Similarly, the second moment is obtained by differentiating the MGF twice:

M''(t) = d^2/dt^2 [M(t)],

and evaluating at t = 0:

E(X^2) = M''(0).

By evaluating the derivatives of the MGF and substituting t = 0, we can find the first and second moments of X.

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Please help x has a normal distribution with the specified mean and standard deviation. Find the indicated probability.
= 4; = 6
P (1 ≤ x ≤ 10) =___________

Answers

The probability P(1 ≤ x ≤ 10) is equal to the area A under the standard normal distribution curve. So,

To find the indicated probability, we need to calculate the area under the normal distribution curve between the values of 1 and 10, given that x has a normal distribution with a mean (μ) of 4 and a standard deviation (σ) of 6.

First, we need to standardize the values of 1 and 10 using the z-score formula:

z1 = (1 - μ) / σ

z1 = (1 - 4) / 6

z1 = -3/6

z1 = -0.5

z2 = (10 - μ) / σ

z2 = (10 - 4) / 6

z2 = 6/6

z2 = 1

Now, we can look up the area under the standard normal distribution curve between z = -0.5 and z = 1 using a standard normal distribution table or a statistical software. Let's denote this area as A.

Finally, the probability P(1 ≤ x ≤ 10) is equal to the area A under the standard normal distribution curve. So,

P(1 ≤ x ≤ 10) = A

By finding the appropriate area A, we can determine the indicated probability.

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In your second post, look for a follow student's comment that you feel has merit and reply to that. Try to add additional points on why their issue is important, and your own thoughts on it. No need to be contrarian on this board, this is not meant to be a debate. Just people sharing what they things is important, and worthy of attention why is importance for the online activists to consider the limitations on freedom of expression when posting about unsafe environment What is the distinction between a generalist and a specialist inthe HR function?Explain which is more likely to be found in a small firm.(300 words) Scenario 4: Online Directory Sales Inquiry Purple Pages online directory has been calling to list your company on their website. The account manager is persistent. They say that although they do not have Clothing as a category, some companies in the past have used the Accessories category and made out just fine. What important questions should you ask the account manager while considering this service? Select all that apply: Are competitors listed on the website? Will users be confused when the company is in the Accessories category? How much does the service cost? What demographic of users are visiting Purple Pages? O O O O A newspaper published an article about a study in which researchers subjected laboratory gloves to stress. Among 225 vinyl gloves, 67% leaked viruses. Among 225 latex gloves, 8% leaked viruses. Using the accompanying display of the technology results, and using a 0.01 significance level, test the claim that vinyl gloves have a greater virus leak rate than latex gloves. Let vinyl gloves be population 1. Demand 2000, optimal order quantity level -400, what is the expected days between orders for a 250-dayworking year50202510 "A 3.35% coupon bond with 21 years left to maturity can be called in 13 years, The call premium is 1 year of coupon payments, It is currently offered for sale at $960.00, (Assume interest payments are semiannual) - What is the yield to call ? "a 3.74%b 3.53%c 1.91%d 3.62%e 3.95% Illusory anonymity Moral disengagement Intuition The abundance effect Ego-depletion during which season you will recommend to carryoutexcavation for construction. also give reason