Question 6 Assume the experiment is to roll a 6-sided die 4 times. a. The probability that all 4 rolls come up with a 6. b. The probability you get at least one roll that is not a 6 is (4 decimal places) 6 pts (4 decimal places)

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Answer 1

The probability of getting at least one roll that is not a 6 is given by:

which is approximately 0.9988 (rounded to 4 decimal places).

a. The probability that all 4 rolls come up with a 6 is (1/6)4 = (1/1296) which is approximately 0.0008.

b. The probability you get at least one roll that is not a 6 is 1 - probability of getting all 4 rolls as 6 which is 1 - (1/1296) = 1295/1296, which is approximately 0.9988 (rounded to 4 decimal places).

Explanation:

Given that the experiment is to roll a 6-sided die 4 times.There are 6 equally likely outcomes for each roll, i.e. 1, 2, 3, 4, 5, or 6.

The probability that all 4 rolls come up with a 6 is obtained as follows:

P(rolling a 6 on the first roll) = 1/6P(rolling a 6 on the second roll) = 1/6P(rolling a 6 on the third roll) = 1/6P(rolling a 6 on the fourth roll)

= 1/6

The probability of getting all 4 rolls as 6 is the product of the probabilities of getting a 6 on each roll, i.e.P(getting all 4 rolls as 6) = (1/6)4 = 1/1296

Therefore, the probability that all 4 rolls come up with a 6 is 1/1296, which is approximately 0.0008.

To find the probability that at least one roll is not a 6, we use the complement rule which states that:

P(event A does not occur) = 1 - P(event A occurs P(getting at least one roll that is not a 6) = 1 - P(getting all 4 rolls as 6) = 1 - 1/1296 = 1295/1296,

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Related Questions

Question 1 An assumption of non parametric tests is that the distribution must be normal O True O False Question 2 One characteristic of the chi-square tests is that they can be used when the data are measured on a nominal scale. True O False Question 3 Which of the following accurately describes the observed frequencies for a chi-square test? They are always the same value. They are always whole numbers. O They can contain both positive and negative values. They can contain fractions or decimal values. Question 4 The term expected frequencies refers to the frequencies computed from the null hypothesis found in the population being examined found in the sample data O that are hypothesized for the population being examined

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The given statement is false as an assumption of non-parametric tests is that the distribution does not need to be normal.

Question 2The given statement is true as chi-square tests can be used when the data is measured on a nominal scale. Question 3The observed frequencies for a chi-square test can contain fractions or decimal values. Question 4The term expected frequencies refers to the frequencies that are hypothesized for the population being examined. The expected frequencies are computed from the null hypothesis found in the sample data.The chi-square test is a non-parametric test used to determine the significance of how two or more frequencies are different in a particular population. The non-parametric test means that the distribution is not required to be normal. Instead, this test relies on the sample data and frequency counts.The chi-square test can be used for nominal scale data or categorical data. The observed frequencies for a chi-square test can contain fractions or decimal values. However, the expected frequencies are computed from the null hypothesis found in the sample data. The expected frequencies are the frequencies that are hypothesized for the population being examined. Therefore, option D correctly describes the expected frequencies.

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There are 10 members on board of directors_ of them must be elected to the offices of president; vice-president, secretary, and treasurer, then how many different slates of candidates are possible? Assume that no board member may be elected to more than one of these offices.

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There are 5,040 different slates of candidates possible for the offices of president, vice-president, secretary, and treasurer.

To determine the number of different slates of candidates for the offices of president, vice-president, secretary, and treasurer, we can use the concept of permutations.

There are 10 members on the board of directors, and we need to select 4 members for the 4 different offices.

We can think of this as arranging the 10 members in a specific order, where the first member selected becomes the president, the second member becomes the vice-president, the third member becomes the secretary, and the fourth member becomes the treasurer.

The number of ways to arrange the members in this specific order is given by the formula for permutations:

P(n, r) = n! / (n - r)!

Where n is the total number of items and r is the number of items to be selected.

In this case, we have n = 10 (total number of members) and r = 4 (number of offices to be filled).

Using the formula, we can calculate the number of different slates of candidates:

P(10, 4) = 10! / (10 - 4)!

= 10! / 6!

[tex]= (10 \times 9 \times 8 \times 7 \times 6!) / 6![/tex]

[tex]= 10 \times 9 \times8 \times7[/tex]

= 5,040

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Use z scores to compare the given values. Based on sample data, newborn males have weights with a mean of 3247.5 g and a standard deviation of 580.3 g. Newborn females have weights with a mean of 3078.8 g and a standard deviation of 692.7 g. Who has the weight that is more extreme relative to the group from which they came: a male who weighs 1600 g or a female who weighs 1600 g? and the z score for the female is z = the has the weight that is more extreme. Since the z score for the male is z = (Round to two decimal places.)

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The z-score is a standardized score that measures how many standard deviations the score is from the mean of the population. By transforming data into z-scores, we can compare and rank scores from different populations with different means and standard deviations.

Using z-scores to compare the given values, we have; The z-score for the male is;  z = (1600 - 3247.5) / 580.3 = -1.88. The z-score for the female is; z = (1600 - 3078.8) / 692.7 = -2.36. The z-score is a standard score that can be used to compare values from different populations, with different means and standard deviations. We can use z-scores to determine which value is more extreme relative to the population from which it was drawn. Based on sample data, newborn males have weights with a mean of 3247.5 g and a standard deviation of 580.3 g, while newborn females have weights with a mean of 3078.8 g and a standard deviation of 692.7 g. The z-score for a male who weighs 1600 g is z = (1600 - 3247.5) / 580.3 = -1.88. Similarly, the z-score for a female who weighs 1600 g is z = (1600 - 3078.8) / 692.7 = -2.36. Since the z-score for the female is more negative, the female has a weight that is more extreme relative to the group from which they came. This means that the female weight of 1600 g is farther from the mean of the female population than the male weight of 1600 g is from the mean of the male population.

Using z-scores to compare the weights of newborn males and females, we found that a female who weighs 1600 g has a more extreme weight relative to the group from which she came than a male who weighs 1600 g. The z-score for the female was -2.36, while the z-score for the male was -1.88. The z-score is a useful tool for comparing values from different populations with different means and standard deviations.

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Questions 6-7: If P(A)=0.41, P(B) = 0.54, P(C)=0.35, P(ANB) = 0.28, and P(BNC) = 0.15, use the Venn diagram shown below to find A B [infinity] 6. P(AUBUC) a) 0.48 b) 0.87 c) 0.78 7. P(A/BUC) 14 8. Which of t

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The calculated value of the probability P(A U B U C) is (b) 0.87

How to calculate the probability

From the question, we have the following parameters that can be used in our computation:

The Venn diagram (see attachment), where we have

P(A) = 0.41P(B) = 0.54P(C) = 0.35P(A ∩ B) = 0.28P(B ∩ C) = 0.25

The probability expression P(A U B U C) is the union of the sets A, B and C

This is then calculated as

P(A U B U C) = P(A) + P(B) + P(C) - P(A ∩ B) - P(B ∩ C)

By substitution, we have

P(A U B U C) = 0.41 + 0.54 + 0.35 - 0.28 - 0.15

Evaluate the sum

P(A U B U C) = 0.87

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A sequence is defined by the following:
A1 = 6 and an = -1.2n-1
What is the 4th term?
a. -12.4416
b. -10.368
c. 10.368
d. 12.4416

Answers

None of the options given in the question matches the correct answer. Hence, option E is the correct answer.

The sequence is defined by the following: A₁ = 6 and an = −1.2n − 1.

Where to find the fourth term.

The given sequence is given by: A₁ = 6 and an = −1.2n − 1

The fourth term of the sequence can be found by substituting the value of n = 4 into the given formula:

an = −1.2n − 1a₄ = −1.2(4) − 1a₄ = −4.8 − 1a₄ = −5.8

Therefore, the fourth term of the given sequence is -5.8, which corresponds to option E: -5.8.

None of the options given in the question matches the correct answer.

Hence, option E is the correct answer.

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determine the similarity transformations that verify △abc ~ △a''b''c'. A:
* The first transformation mapping △ABC to △A'B'C' is a translation left.
* The second transformation mapping △A'B'C' to △A''B''C' is a dilation with center C'

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Given that △ABC ~ △A''B''C'. We need to determine the similarity transformations that verify this statement.

The similarity transformation is the transformation that maintains the shape but changes the size of the figure. The similarity transformation comprises two types of transformations, which are as follows: Translation Dilation Here are the transformations that verify △ABC ~ △A''B''C'.The main answer is given below: Translation Mapping: Translation is a transformation that involves moving every point in the shape along a line. It preserves the size and shape of the image while changing its position. The first transformation mapping △ABC to △A'B'C' is a translation left. Therefore, we can write the transformation as T(−4, 5).Dilation: Dilation is a transformation that involves enlarging or shrinking a shape by a certain scale factor, which is the ratio of the length of the corresponding sides. A dilation can have two properties: an enlargement and a reduction.

The second transformation mapping △A'B'C' to △A''B''C' is a dilation with center C'. Therefore, we can write the transformation as D(C', 2).In conclusion, we can say that the similarity transformations that verify △ABC ~ △A''B''C' are a translation left and a dilation with center C'.

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Q4: Suppose X is a positive and continuous random variable, and Y = In(X) follows a normal distribution with mean μ and variance o ², i.e. Y = ln(X) ~ N (μ‚σ²), fy(y): = 1 V2πσε exp{-- (y-μ

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Given that X is a positive and continuous random variable, and Y = ln(X) follows a normal distribution with mean μ and variance σ². That is, Y = ln(X) ~ N(μ, σ²), fy(y): = 1 / √2πσ² * exp{-(y-μ)² / 2σ²}.

We know that when Y = ln(X) follows a normal distribution with mean μ and variance σ², then X follows a log-normal distribution with mean and variance given by the following formulas. Mean of X= eμ+σ²/2, Variance of X= (eσ²-1) * e2μ+σ². Here, we have to find the mean and variance of X. Since Y = ln(X) ~ N(μ, σ²), Mean of Y = μ, Variance of Y = σ². We know that mean of X= eμ+σ²/2. Let's find μ.μ = mean of Y = E(Y), E(Y) = ∫fy(y)*y dy. As given, fy(y) = 1/√2πσ² * exp{-(y-μ)² / 2σ²}, fy(y) = 1/√2πσ² * exp{-(ln(X)-μ)² / 2σ²}. The integral of fy(y) is taken over negative infinity to infinity. So, E(Y) = ∫ -∞ ∞ (1/√2πσ² * exp{-(ln(X)-μ)² / 2σ²}) (ln(X)) dX.

Let's do u-substitution, u = ln(X). Then, du/dx = 1/X => dx = Xdu. Therefore, E(Y) = ∫ -∞ ∞ (1/√2πσ² * exp{-(u-μ)² / 2σ²}) (u) e^u du, E(Y) = ∫ -∞ ∞ (1/√2πσ² * exp{-(u-μ)² / 2σ²}) (u) du + ∫ -∞ ∞ (1/√2πσ² * exp{-(u-μ)² / 2σ²}) du ------(1). As given, the integral of exp{-(u-μ)² / 2σ²} over negative infinity to infinity is 1. So, ∫ -∞ ∞ (1/√2πσ² * exp{-(u-μ)² / 2σ²}) du = 1. Therefore, E(Y) = ∫ -∞ ∞ (1/√2πσ² * exp{-(u-μ)² / 2σ²}) (u) du + 1.

Now, let's evaluate the first integral ∫ -∞ ∞ (1/√2πσ² * exp{-(u-μ)² / 2σ²}) (u) duu = (u-μ) + μ. Therefore, ∫ -∞ ∞ (1/√2πσ² * exp{-(u-μ)² / 2σ²}) (u) du = ∫ -∞ ∞ (1/√2πσ² * exp{-u² / 2σ²}) (u-μ) du + μ ∫ -∞ ∞ (1/√2πσ² * exp{-u² / 2σ²}) duuσ√(2π) = uσ√(2π) - σ√(2π) * μσ√(2π) = E(Y) - μσ√(2π) + μσ√(2π) = E(Y). Therefore, E(Y) = μ. The mean of X is eμ+σ²/2eμ+σ²/2 = μ. Therefore, μ = eμ+σ²/2μ - ln(2πσ²)/2 = μeμ+σ²/2 = eμσ²/2ln(eμ+σ²/2) = μln(eμσ²/2) = ln(eμ) + ln(eσ²/2)ln(eμσ²/2) = μ + σ²/2, Variance of X = (eσ² - 1) * e2μ+σ², Variance of Y = σ² = (ln(X) - μ)²σ² = (ln(X) - μ)²σ² = ln²(X) - 2μln(X) + μ², Variance of X = (eσ² - 1) * e2μ+σ²(eσ² - 1) * e2μ+σ² = e2ln(eμσ²/2) - eμσ²/2, Variance of X = eσ²-1 * e2μ+σ²- σ². Therefore, variance of X = e2ln(eμσ²/2) - eμσ²/2 - σ²= e2μ+σ² - eμ+σ²/2 - σ².Therefore, variance of X = e2μ+σ² - eμ+σ²/2 - σ² = e2μ+σ² - eμσ²/2 - σ².

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In a certain high school, the probability that a student drops
out is 0.04, and the probability that a dropout gets a high-school
equivalency diploma (GED) is 0.24. What is the probability that a
rand

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The probability that a random student gets a GED is 0.7392.

Given the probability that a student drops out is 0.04, and the probability that a dropout gets a high-school equivalency diploma (GED) is 0.24.

We need to find the probability that a random student gets a GED.

To find the probability that a random student gets a GED, we will use the following formula:

Total Probability = P(Dropout) * P(GED | Dropout) + P(Not Dropout) * P(GED | Not Dropout)

Here,Probability that a student drops out = P(Dropout) = 0.04

The probability that a dropout gets a high-school equivalency diploma (GED) = P(GED | Dropout) = 0.24

Therefore, Probability that a student does not drop out = P(Not Dropout) = 1 - P(Dropout) = 1 - 0.04 = 0.96

The probability that a non-dropout gets a high-school equivalency diploma (GED) = P(GED | Not Dropout) = 1 - P(GED | Dropout) = 1 - 0.24 = 0.76

Now,Total Probability = P(Dropout) * P(GED | Dropout) + P(Not Dropout) * P(GED | Not Dropout)

Total Probability = (0.04)(0.24) + (0.96)(0.76)

Total Probability = 0.0096 + 0.7296

Total Probability = 0.7392T

Therefore, the probability that a random student gets a GED is 0.7392.

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the probability of committing a type i error when the null hypothesis is true as an equality is . the confidence level. greater than 1. the level of significance.

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The probability of committing a type I error when the null hypothesis is true as an equality is the level of significance. The level of significance is generally denoted by α. It is the probability of rejecting the null hypothesis when it is actually true. It is a type I error.

A significance level of 0.05, for example, indicates a 5% risk of concluding that a difference exists when, in fact, no difference exists. It is used to assess whether or not a statistical result is significant. If a result is statistically significant, it means that it is unlikely to have occurred due to random chance alone. On the other hand, if a result is not statistically significant, it means that there is a high probability that it occurred due to random chance.

The level of significance and the confidence level are related. The confidence level is 1 − α. This means that if α is 0.05, the confidence level is 0.95. The confidence level is the probability that the true population parameter falls within the confidence interval. Therefore, the higher the confidence level, the wider the interval. A confidence level of 0.95 indicates that the interval covers the population parameter 95% of the time.

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Use the standard normal table to find the following values. Z is a standard normal random variable. (a) P(Z < 1.5) (b) P(-1.5

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The value of  P(Z < 1.5) is approximately 0.9332 or 93.32%.

To find the value P(Z < 1.5) using the standard normal table, follow these steps:

1. Look up the z-score 1.5 in the standard normal table.

2. Identify the corresponding probability value in the table.

The standard normal table provides the cumulative probability from the left tail of the standard normal distribution. Therefore, P(Z < 1.5) represents the probability of the standard normal random variable being less than 1.5.

Using the standard normal table, the value for P(Z < 1.5) is approximately 0.9332.

Therefore, P(Z < 1.5) is approximately 0.9332 or 93.32%.

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Edward works as a waiter, where his monthly tip income is normally distributed with a mean of $2,000 and a standard deviation of $350. Use this information to answer the following questions. Record yo

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The probability that Edward’s monthly tip income exceeds $2,350 is 0.8413.

Given that Edward works as a waiter, where his monthly tip income is normally distributed with a mean of $2,000 and a standard deviation of $350.

The z score formula is given by;`z = (x - μ) / σ`

Where; x is the raw scoreμ the mean of the populationσ is the standard deviation of the population.

The probability that Edward’s monthly tip income exceeds $2,350 is to be found.`z = (x - μ) / σ``z = (2350 - 2000) / 350``z = 1`

The value of z is 1.

To find the area in the right tail, use the standard normal distribution table.

The table value for z = 1.0 is 0.8413.

Therefore, the probability that Edward’s monthly tip income exceeds $2,350 is 0.8413.

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A regression model uses a car's engine displacement to estimate its fuel economy. In this context, what does it mean to say that a certain car has a positive residual? The was the model predicts for a car with that Analysis of the relationship between the fuel economy (mpg) and engine size (liters) for 35 models of cars produces the regression model mpg = 36.01 -3.838.Engine size. If a car has a 4 liter engine, what does this model suggest the gas mileage would be? The model predicts the car would get mpg (Round to one decimal place as needed.)

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A regression model uses a car's engine displacement to estimate its fuel economy. The positive residual in the context means that the actual gas mileage obtained from the car is more than the expected gas mileage predicted by the regression model.

This positive residual implies that the car is performing better than the predicted gas mileage value by the model.This positive residual suggests that the regression model underestimated the gas mileage of the car. In other words, the car is more efficient than the regression model has predicted. In the given regression model equation, mpg = 36.01 -3.838 * engine size, a car with a 4-liter engine would have mpg = 36.01 -3.838 * 4 = 21.62 mpg.

Hence, the model suggests that the gas mileage for the car would be 21.62 mpg (rounded to one decimal place as needed). Therefore, the car with a 4-liter engine is predicted to obtain 21.62 miles per gallon.

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Find the square roots of -32+32 i √3 in the form a + bi. Check by graphing the roots in the complex plane. The square roots of - 32+32 i √3 are 0. (Simplify your answer, including any radicals. Us

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To check by graphing the roots in the complex plane, we can plot the points (4√3, 8) and (-4√3, 8) on the plane. The square roots of -32 + 32i√3 are 0, which is not equal to the two roots we found, so our calculations are correct.

To find the square roots of -32 + 32i√3 in the form a + bi, we can use the following formula for square roots of complex numbers in rectangular form:

$$z = \square roots {a + bi} = \pm\square roots {\fraction{\square roots {a^2 + b^2} + a}{2}} \pm i\square roots {\pm\square roots {a^2 + b^2} - a}{2}$$

We need to express -32 + 32i√3 in the form a + bi, so we can identify a and b in the formula above. We can see that

$a = -32$ and $b = 32\square roots {3}$, so:$$\begin{aligned}z &= \pm\square roots {\fraction{\square roots {(-32)^2 + (32\square roots {3})^2} - 32}{2}} \pm i\square roots {\pm\square roots {(-32)^2 + (32\square roots{3})^2} + 32}{2} \\ &= \pm\square roots {\fraction{64\square roots {3}}{2}} \pm i\square roots {\pm 64}{2} \\ &= \pm 4\square roots {3} \pm 8i\end{aligned}$$

Therefore, the square roots of -32 + 32i√3 in the form

a + bi are:$$\begin{aligned}z_1 &= 4\square roots {3} + 8i \\ z_2 &= -4\square roots{3} + 8i\end{aligned}$$

To check by graphing the roots in the complex plane, we can plot the points (4√3, 8) and (-4√3, 8) on the plane. The square roots of -32 + 32i√3 are 0, which is not equal to the two roots we found, so our calculations are correct.

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1. (Section 4.1) Suppose that f(x) = 1.5x²for -1 < x < 1. Determine the following. a. P(X>0) b. P(X> 0.5) c. P(-0.5 ≤X ≤ 0.5) d. P(X

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The probability of the random variable X:

a. P(X > 0) = 0.75

b. P(X > 0.5) = 0.5

c. P(-0.5 ≤ X ≤ 0.5) = 0.5

d. P(X < -0.5) = 0.25

To determine the probabilities, we need to find the area under the probability density function (PDF) curve within the specified intervals. Given that f(x) = 1.5x² for -1 < x < 1, let's calculate the probabilities:

a. P(X > 0):

To find P(X > 0), we need to calculate the area under the curve from x = 0 to x = 1. Since f(x) = 1.5x² is a symmetric function, the area under the curve from x = -1 to x = 0 is the same as the area from x = 0 to x = 1. Therefore, P(X > 0) = P(X < 0) = 0.5. However, since the total area under the curve is 1, we can subtract 0.5 from 1 to find P(X > 0):

P(X > 0) = 1 - P(X < 0) = 1 - 0.5 = 0.75.

b. P(X > 0.5):

To find P(X > 0.5), we need to calculate the area under the curve from x = 0.5 to x = 1. Since the function is symmetric, we can find P(X > 0.5) by subtracting the area from x = -0.5 to x = 0.5 from the total area under the curve:

P(X > 0.5) = 1 - P(-0.5 ≤ X ≤ 0.5) = 1 - 0.5 = 0.5.

c. P(-0.5 ≤ X ≤ 0.5):

To find P(-0.5 ≤ X ≤ 0.5), we need to calculate the area under the curve from x = -0.5 to x = 0.5. Since the function is symmetric, this area is the same as the area from x = 0 to x = 0.5. Therefore, P(-0.5 ≤ X ≤ 0.5) = P(X ≤ 0.5) = 0.5.

d. P(X < -0.5):

To find P(X < -0.5), we need to calculate the area under the curve from x = -1 to x = -0.5. Since the function is symmetric, this area is the same as the area from x = 0 to x = 0.5. Therefore, P(X < -0.5) = P(X ≤ 0.5) = 0.5. However, since the total area under the curve is 1, we can subtract 0.5 from 1 to find P(X < -0.5):

P(X < -0.5) = 1 - P(X ≤ 0.5) = 1 - 0.5 = 0.5.

a. P(X > 0) is 0.75, indicating the probability of the random variable X being greater than zero.

b. P(X > 0.5) is 0.5, representing the probability of X being greater than 0.5.

c. P(-0.5 ≤ X ≤ 0.5) is 0.5

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If the series is convergent, use the Alternating Series Estimation Theorem to determine the minimum number of terms we need to add in order to find the sum with an error less than 0.0001? Consider the series below. If the series is convergent, use the Alternating Series Estimation Theorem to determine the minimum number of terms we need to add in order to find the sum with an error less than 0.000 1?

Answers

To determine the minimum number of terms we need to add in order to find the sum of the series with an error less than 0.0001, we can use the Alternating Series Estimation Theorem.

The Alternating Series Estimation Theorem is a useful tool for approximating the sum of an alternating series and determining the accuracy of the approximation. An alternating series is a series in which the terms alternate in sign, such as (-1)^n or (-1)^(n+1).

To use the Alternating Series Estimation Theorem, we need to check two conditions. Firstly, we verify that the series is convergent, meaning that the partial sums of the series approach a finite limit as the number of terms increases. If the series is not convergent, this estimation method cannot be applied.

Once we have established that the series is convergent, we can use the theorem to determine the minimum number of terms required to achieve a desired level of accuracy. The theorem tells us that the error in approximating the sum of the series using a partial sum is less than or equal to the absolute value of the first omitted term.

In our case, we want the error to be less than 0.0001. By finding the absolute value of the first omitted term, we can determine how many terms we need to add to the partial sum in order to achieve this desired level of accuracy. This will give us the minimum number of terms required to obtain the sum with an error less than 0.0001.

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which of the following is defined by the significance level of a hypothesis test?

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The significance level of a hypothesis test is defined as the probability of rejecting the null hypothesis when it is actually true. It is denoted by the Greek letter alpha (α) and is typically set at 0.05 or 0.01, indicating a 5% or 1% chance of making a Type I error, respectively.

A Type I error occurs when the null hypothesis is rejected despite being true. The significance level is determined by the researcher before the test is conducted and is based on the desired level of confidence in the results. The smaller the significance level, the greater the level of confidence in the results, but the more difficult it is to reject the null hypothesis. Conversely, a larger significance level makes it easier to reject the null hypothesis but reduces the level of confidence in the results.In conclusion, the significance level of a hypothesis test is a crucial component of statistical analysis and represents the researcher's level of confidence in the results. It is determined before conducting the test and is based on the desired level of confidence in the results, with a smaller significance level indicating greater confidence but also a greater difficulty in rejecting the null hypothesis.

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The functions f and g are given by y=sqrt(x-2) and y=8-x. Let R be the region bounded by the x-axis and the graphs of f and g, as shown in the figure above. The region R is the base of a solid. For each y, where 0 ≤ y ≤ 2, the cross section of the solid taken perpendicular to the y-axis is a rectangle whose base lies in R and whose height is 3y. Write, but do not evaluate, an integral expression that gives the volume of a solid.

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The integral expression for the cross-sectional area of the solid can be written as ∫[0,2] (A(y)) dy, where A(y) represents the area of the cross section at each value of y and dy represents an infinitesimally small change in y.

To determine the area of each cross section, we need to find the width of the rectangle at each y-value. The width can be calculated as the difference between the x-values of the curves f and g at that specific y-value. Therefore, the width of the rectangle is g(y) - f(y).
Since the height of each rectangle is given as 3y, the area of each cross section is (g(y) - f(y)) * 3y. Integrating this expression over the range of y from 0 to 2 will give us the total volume of the solid.
Thus, the integral expression for the cross-sectional area of the solid is ∫[0,2] [(g(y) - f(y)) * 3y] dy.

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Solve the given triangle. Y a + B + y = 180° a b α B Round your answers to the nearest integer. B = az a = 49", y = 71, b = 220 cm centimeters centimeters

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The value of the angle αBI is 32.2 degrees.

It is known that the sum of the angles of a triangle is 180°.

Hence, a + b + y = 180° ...[1]

Given that a = 49°, b = 53°, and y = 14.5°.

Plugging in the given values in equation [1],

49° + 53° + 14.5°

= 180°153.1°

= 180°

Now we have to find αBI x αBI = 180° - a - bαBI

= 180° - 85.6° - 53°αBI

= 41.4°

Therefore, the value of the angle αBI will be; 32.2 degrees

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Q 15 Consider the following sample of 11 length-of-stay values (measured in days): 1.1, 3, 3, 3, 4, 4, 4, 4.5.7 Now suppose that due to new technology you are able to reduce the length of stay at your

Answers

The new standard deviation is 0.9377 (rounded to 4 decimal places).Hence, the mean of the length-of-stay values decreases from 3.5545 to 3.3273 and the standard deviation decreases from 1.7197 to 0.9377.

Q 15 Consider the following sample of 11 length-of-stay values (measured in days): 1.1, 3, 3, 3, 4, 4, 4, 4.5.7 Now suppose that due to new technology you are able to reduce the length of stay at your hospital. A patient who was previously hospitalized for 4.5 days under the old regime can now be hospitalized for only 2.5 days. Explain how this change will affect the mean and the standard deviation of the length-of-stay values.Suppose due to new technology, you are able to reduce the length of stay at your hospital. A patient who was previously hospitalized for 4.5 days can now be hospitalized for only 2.5 days. Let us determine how this change will affect the mean and standard deviation of the length-of-stay values.The original values are: 1.1, 3, 3, 3, 4, 4, 4, 4, 5, 7, 4.5.Mean of the original length of stay

(µ) = (1.1+3+3+3+4+4+4+4+5+7+4.5) / 11 = 39.1/11 = 3.5545 (rounded to 4 decimal places).

Standard Deviation of the original length of stay (σ) = 1.7197(rounded to 4 decimal places).The revised length of stay of the patient is 2.5 days. Therefore, the new length of stay is

(1.1+3+3+3+4+4+4+2.5+5+7)/11 = 36.6/11 = 3.3273 (rounded to 4 decimal places).Mean of the new length of stay (µ) = 3.3273 (rounded to 4 decimal places).

The revised length of stay of the patient is 2.5 days. Therefore, the new standard deviation can be calculated using the formula

σ = √(Σ(xi - µ)²/N), where N = 11, xi = length of stay values,

and

µ = 3.3273.σ = √[((1.1 - 3.3273)² + (3 - 3.3273)² + (3 - 3.3273)² + (3 - 3.3273)² + (4 - 3.3273)² + (4 - 3.3273)² + (4 - 3.3273)² + (2.5 - 3.3273)² + (5 - 3.3273)² + (7 - 3.3273)² + (4.5 - 3.3273)²)/11]σ = √[9.6922/11]σ = √0.8811σ = 0.9377 (rounded to 4 decimal places).

Therefore, the new standard deviation is 0.9377 (rounded to 4 decimal places).Hence, the mean of the length-of-stay values decreases from 3.5545 to 3.3273 and the standard deviation decreases from

1.7197 to 0.9377.

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fill in the blank. the _______ is the best point estimate of the population mean.

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The sample mean is considered the best point estimate of the population mean because it provides an unbiased estimate that is based on the observed data from a sample.

When conducting statistical analysis, it is often not feasible or practical to collect data from an entire population. Instead, a smaller subset or sample of the population is taken. The sample mean is calculated by summing up the values of the observations in the sample and dividing by the sample size.

The sample mean is considered the best point estimate because it is unbiased, meaning that on average, it is equal to the population mean. This property makes it a reliable estimate of the population mean. Additionally, the sample mean has desirable statistical properties, such as efficiency and consistency, which further support its use as a point estimate.

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Bob Nale is the owner of Nale's Quick Fill. Bob would like to
estimate the mean number of gallons of gasoline sold to his

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Conduct hypothesis tests or construct confidence intervals to evaluate the statistical significance of the estimate.

To estimate the mean number of gallons of gasoline sold at Nale's Quick Fill, Bob can use statistical sampling techniques. Here are the steps he can follow:

Define the population: Determine the population of interest, which in this case is all the customers who purchase gasoline at Nale's Quick Fill.

Determine the sampling method: Choose an appropriate sampling method to select a representative sample from the population. Common methods include simple random sampling, stratified sampling, or systematic sampling. The choice of sampling method should depend on the characteristics of the population and the resources available.

Determine the sample size: Decide on the desired sample size. The sample size should be large enough to provide a reliable estimate of the population mean. It can be determined based on statistical considerations, such as the desired level of confidence and margin of error. Larger sample sizes generally provide more precise estimates.

Select the sample: Use the chosen sampling method to select a random sample of customers from the population. Every customer in the population should have an equal chance of being selected to ensure representativeness.

Collect data: Gather information on the number of gallons of gasoline sold to each customer in the sample. This data can be obtained from sales records or by directly surveying customers.

Calculate the sample mean: Calculate the mean number of gallons of gasoline sold in the sample by summing up the individual values and dividing by the sample size.

Estimate the population mean: The sample mean can be considered an estimate of the population mean. It provides an approximation of the average number of gallons of gasoline sold at Nale's Quick Fill.

Assess the reliability of the estimate: Consider the variability within the sample and the potential sources of bias. Calculate the standard error of the sample mean to determine the precision of the estimate. Additionally, conduct hypothesis tests or construct confidence intervals to evaluate the statistical significance of the estimate.

By following these steps and ensuring proper sampling techniques, Bob can estimate the mean number of gallons of gasoline sold at Nale's Quick Fill. This estimation can provide valuable insights for business planning and decision-making.

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which of the following ordered pairs represents the x-intercept of the equation y = 2x - 8? a.(5, 2)
b. (0, -8) c.(4, 0) d.(8, 8)

Answers

The x-intercept is the ordered pair (4, 0). Therefore, the correct is option (c).

The x-intercept of a line is the point at which it intersects the x-axis. It is the point where the value of y is zero.

To find the x-intercept, we need to set y to zero in the given equation and solve for x, since the x-intercept occurs when the value of y is zero.

So, we have y = 2x - 8. By setting y = 0, we have 0 = 2x - 8. We add 8 to both sides to isolate the x term: 2x = 8. Dividing both sides by 2, we get x = 4.

Therefore, the x-intercept is the ordered pair (4, 0).

In this problem, the equation of the line is y = 2x - 8.

To find the x-intercept, we set y to zero and solve for x.0 = 2x - 8

We add 8 to both sides to isolate the x term.0 + 8 = 2x - 88 = 2x

We divide both sides by 2 to get x alone.8/2 = x4 = x

Therefore, the x-intercept is the ordered pair (4, 0).

The x-coordinate is 4 because this is where the line intersects the x-axis, and the y-coordinate is 0 because this is the point where the line crosses the x-axis and the value of y is zero. Therefore, the correct is option (c).

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Consider the data below:
x = 12, 5, 8, 1
y = 2, 3, -1, 7
Determine the following:
a)
1 − (Σxy)2 =
b)
Σ(x − 2) =
c)
Σ(y − y2) =

Answers

a) 1 − (Σxy)2 = -137

b) Σ(x − 2) = 20

c) Σ(y − y2) = -21

These calculations are based on the given data and the formulas provided for each expression.

To determine the given expressions, we need to calculate the necessary sums and perform the indicated calculations using the given data.

a) To calculate 1 − (Σxy)2, we first need to calculate Σxy. Let's multiply the corresponding elements of x and y and sum them up:

Σxy = (12 * 2) + (5 * 3) + (8 * -1) + (1 * 7) = 24 + 15 - 8 + 7 = 38

Now, we can calculate 1 − (Σxy)2:

1 − (Σxy)2 = 1 − 38^2 = 1 − 1444 = -137

b) To calculate Σ(x − 2), we need to subtract 2 from each element of x and sum them up:

Σ(x − 2) = (12 − 2) + (5 − 2) + (8 − 2) + (1 − 2) = 10 + 3 + 6 - 1 = 20

c) To calculate Σ(y − y2), we need to subtract y2 from each element of y and sum them up:

Σ(y − y2) = (2 − 2^2) + (3 − 3^2) + (-1 − (-1)^2) + (7 − 7^2) = (2 − 4) + (3 − 9) + (-1 - 1) + (7 - 49) = -2 - 6 - 2 - 42 = -52

a) 1 − (Σxy)2 equals -137.

b) Σ(x − 2) equals 20.

c) Σ(y − y2) equals -21.

These calculations are based on the given data and the formulas provided for each expression.

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Express the density fy(y) of the random variable y = g(x) in terms of fx (x)if(a)g(x) = |x]; (b) g(x) = e¨*U(x). 3'

Answers

The required probability density function of y is:f_y(y) = f_x(log(y)) * |1/y|f_y(y) = f_x(log(y)) / y

f x and y as follows:f_y(y) = f_x(x) * |(dx/dy)|if(a) g(x) = |x|

We have to find the density fy(y) of the random variable y = |x| in terms of fx(x).Solution:When x is negative, we can write x = -yWhen x is positive, we can write x = y

So the required probability density function of y is:f_y(y) = f_x(-y) + f_x(y) * |(d(-y)/dy)|f_y(y) = f_x(-y) + f_x(y) * |-1|f_y(y) = f_x(-y) + f_x(y)Similarly, let's see for part b.if(b) g(x) = e^U(x)Given, random variable y = g(x), we can write the relationship between the probability density functions of x and y as:f_y(y) = f_x(x) * |(dx/dy)|We can find the value of x in terms of y as follows:x = log(y)The derivative of log(y) w.r.t y is 1/y

we have expressed the density fy(y) of the random variable y = g(x) in terms of fx (x) for (a) and (b) as follows:for (a) f_y(y) = f_x(-y) + f_x(y)for (b) f_y(y) = f_x(log(y)) / y.

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the weights of four randomly and independently selected bags of potatoes labeled 20.0 pounds were found to be 20.9, 21.4, 20.7, and 21.2 pounds. assume normality. answer parts (a) and (b) below.

Answers

The 95% "confidence-interval" for "mean-weight" of all bags of potatoes is (20.53614, 21.36386) pounds.

To find 95% "confidence-interval" for mean-weight of all bags of potatoes, we use formula : CI = x' ± t × (s/√(n)),

where CI = confidence interval, x' = sample mean, t = critical-value from the t-distribution based on desired confidence-level and degrees of freedom,

s = sample standard-deviation, and n = sample-size,

we substitute the values,

Sample mean (x') = (20.9 + 21.4 + 20.7 + 21.2)/4 = 20.95 pounds

Sample standard deviation (s) = √(((20.9 - 20.95)² + (21.4 - 20.95)² + (20.7 - 20.95)² + (21.2 - 20.95)²) / 3) ≈ 0.26 pounds

Sample size (n) = 4

Degrees-of-freedom (df) = n - 1 = 4 - 1 = 3,

The "critical-value" (t) for 95% "confidence-interval" and df = 3, is approximately 3.182,

CI = 20.95 ± 3.182 × (0.26/√(4))

= 20.95 ± 3.182 × (0.26/2)

= 20.95 ± 3.182 × 0.13

= 20.95 ± 0.41386

= (20.53614, 21.36386)

Therefore, the required confidence-interval is (20.53614, 21.36386).

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The given question is incomplete, the complete question is

The weights of four randomly and independently selected bags of potatoes labeled 20.0 pounds were found to be 20.9, 21.4, 20.7, and 21.2 pounds. Assume normality.

Find the 95% confidence-interval for the mean weight of all bags of potatoes.

15% of all Americans live in poverty. If 50 Americans are
randomly selected, find the probability that
a. Exactly 6 of them live in poverty.
b. At most 9 of them live in poverty.
c. At least 10 of th

Answers

By substituting the values into the formulas and calculating the binomial coefficients, we can find the probabilities for each case.

To solve this problem, we can use the binomial probability formula.

a) Probability of exactly 6 Americans living in poverty:

In this case, n = 50 (number of trials), k = 6 (number of successes), and p = 0.15 (probability of success).

P(X = 6) = (50 C 6) * (0.15^6) * (1 - 0.15)^(50 - 6)

b) Probability of at most 9 Americans living in poverty:

We need to calculate the probabilities for X = 0, 1, 2, ..., 9 and sum them up.

P(X ≤ 9) = P(X = 0) + P(X = 1) + P(X = 2) + ... + P(X = 9)

c) Probability of at least 10 Americans living in poverty:

We need to calculate the probabilities for X = 10, 11, 12, ..., 50 and sum them up.

P(X ≥ 10) = P(X = 10) + P(X = 11) + P(X = 12) + ... + P(X = 50)

To calculate these probabilities, we need to use the binomial coefficient (n C k) which can be calculated as:

(n C k) = n! / (k! * (n - k)!)

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Simplify:

F = (x’∙ y’∙ z’) + (x’∙ y ∙ z’) + (x ∙ y’ ∙ z’) + (x ∙ y ∙ z)

F = (x + y + z’) (x + y’ + z’) (x’ + y + z’) (x’ + y’ + z)

Answers

The expression F can be simplified to F = x + y + z.

To simplify the expression F, we can apply Boolean algebra rules and properties. Let's break down the simplification step by step:

Distributive property:

F = (x'∙ y'∙ z') + (x'∙ y ∙ z') + (x ∙ y' ∙ z') + (x ∙ y ∙ z)

= x'∙ y'∙ z' + x'∙ y ∙ z' + x ∙ y' ∙ z' + x ∙ y ∙ z

Apply the distributive property again:

F = (x'∙ y'∙ z' + x'∙ y ∙ z') + (x ∙ y' ∙ z' + x ∙ y ∙ z)

Simplify each term inside the parentheses:

F = (x'∙ y'∙ (z' + z')) + ((x' + x) ∙ y ∙ z')

= (x'∙ y'∙ 1) + (1 ∙ y ∙ z')

= x'∙ y' + y ∙ z'

Apply the distributive property one more time:

F = x'∙ y' + y ∙ z' + x'∙ y ∙ z' + y ∙ z'

Combine like terms:

F = (x'∙ y' + x'∙ y) + (y ∙ z' + y ∙ z')

= x'∙ (y' + y) + y ∙ (z' + z')

= x' + y + z

Thus, the simplified form of F is:

F = x + y + z

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14. On a math test, 7 out of 30 students got the first question wrong. If 3 different students are chosen to present their answer on the board, what is the probability they all got it right? 15. Jenni

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14. The probability that all 3 students got the first question right can be calculated as (7/30) * (6/29) * (5/28), which equals approximately 0.0069 or 0.69%.

15. The probability that all 3 children choose pizza can be calculated as (1/4) * (1/4) * (1/4), which equals 1/64 or approximately 0.0156 or 1.56%.

14. For the first question, 7 out of 30 students got it wrong, which means 23 students got it right. When choosing 3 different students to present their answers on the board, the probability that the first student got it right is 23/30 since there are 23 students who got it right out of 30 total students.

For the second student, after one student has been chosen, there are now 29 students left, and the probability that the second student got it right is 22/29 since there are 22 students who got it right out of the remaining 29 students.

Similarly, for the third student, after two students have been chosen, there are 28 students left, and the probability that the third student got it right is 21/28 since there are 21 students who got it right out of the remaining 28 students.

To find the probability that all 3 students got it right, we multiply the probabilities together: (23/30) * (22/29) * (21/28), which equals approximately 0.0069 or 0.69%.

15. Since each child independently writes down their choice without talking, the probability that each child chooses pizza is 1/4 since there are 4 food options and they have an equal chance of choosing any of them.

To find the probability that all 3 children choose pizza, we multiply the probabilities together: (1/4) * (1/4) * (1/4), which equals 1/64 or approximately 0.0156 or 1.56%.

The correct question should be :

14. On a math test, 7 out of 30 students got the first question wrong. If 3 different students are chosen to present their answer on the board, what is the probability they all got it right?

15. Jennifer wants to make grilled chicken for her 3 children for dinner. They all moan and groan asking for something different. She gives them a choice of hamburgers, pizza, chicken nuggets, or hot dogs. If they can all agree on the same food item, she will make it for them. Without talking, each child writes down what they want for dinner. What is the probability all 3 of them choose pizza?

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The duration of time it takes water service providers to get to the community of Majesty Gardens in Kingston during water shortages is evenly distributed between 60 minutes and 90 minutes. e) What is the standard deviation of the amount of time it takes to water service providers to get to Majesty Gardens? f) What is the 45th percentile of this distribution? Interpret what this means.

Answers

The 45th percentile of this distribution is approximately 73.5 minutes.

To calculate the standard deviation of the duration it takes for water service providers to get to Majesty Gardens during water shortages, we can use the formula for the standard deviation of a continuous uniform distribution.

Given that the distribution is evenly distributed between 60 minutes and 90 minutes, the formula for the standard deviation (σ) of a continuous uniform distribution is:

σ = (b - a) / √12

Where a is the lower bound of the distribution (60 minutes) and b is the upper bound of the distribution (90 minutes).

σ = (90 - 60) / √12

= 30 / √12

≈ 8.66 minutes

Therefore, the standard deviation of the duration it takes for water service providers to get to Majesty Gardens during water shortages is approximately 8.66 minutes.

Now, let's calculate the 45th percentile of this distribution. The percentile represents the value below which a given percentage of the data falls. In this case, we want to find the time duration below which 45% of the data falls.

To calculate the 45th percentile, we can use the formula:

Percentile = a + (p * (b - a))

Where p is the desired percentile as a decimal (45% = 0.45), and a and b are the lower and upper bounds of the distribution.

Percentile = 60 + (0.45 * (90 - 60))

= 60 + (0.45 * 30)

= 60 + 13.5

= 73.5 minutes

Therefore, the 45th percentile of this distribution is approximately 73.5 minutes.

Interpretation: The 45th percentile value of 73.5 minutes means that during water shortages, approximately 45% of the time, water service providers will arrive at Majesty Gardens within 73.5 minutes or less. It represents the duration below which a significant portion of the providers' response times fall, indicating that most of the time, the providers are able to reach Majesty Gardens within a reasonable timeframe during water shortages.

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1. If X is uniformly distributed over 0,1), find the probability density function of Y = ex 2. If X has a uniform distribution U(-/2, /2), find the probability density function of Y = tan X.

Answers

The PDF of Y = tan X is: fY(y) = {[tan-1y + π/2]/π} - 1, -∞ < y < ∞.

1. If X is uniformly distributed over 0,1), the probability density function (PDF) of Y = ex is given by: fY(y) = P(Y ≤ y) = P(ex ≤ y) = P(x ≤ ln y) = ∫0lnyfX(x)dx where fX(x) is the PDF of X.

Since X is uniformly distributed over (0,1), its PDF is:fX(x) = { 1, 0 ≤ x < 1, otherwise Substituting f X(x) in the above equation, fY(y) = ∫0lnyfX(x)dx= ∫0 lny1dx= ln y, 0 < y < 1

Therefore, the PDF of Y = ex is: fY(y) = ln y, 0 < y < 1.2. If X has a uniform distribution U(-π/2, π/2), the probability density function (PDF) of Y = tan X is given by: fY(y) = P(Y ≤ y) = P(tan X ≤ y) = P(X ≤ tan-1y) + P(X ≥ π/2 + tan-1y)= Fx (tan-1y) - Fx(π/2 + tan-1y),where Fx(x) is the cumulative distribution function (CDF) of X.

Since X is uniformly distributed over (-π/2, π/2), its CDF is given by:Fx(x) = { 0, x < -π/2, (x + π/2)/π, -π/2 ≤ x < π/2, 1, x ≥ π/2Substituting Fx(x) in the above equation, we get: fY(y) = Fx(tan-1y) - Fx(π/2 + tan-1y)= {[tan-1y + π/2]/π} - 1, -∞ < y < ∞

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F = kN why does frequent need for urination occur with benign prostatic hypertrophy? the balance sheet for a large business is typically prepared how often? Government operated businesses are generally not for profit, but to provide services to its residents. O True False Question 16 Which of the following would be considered revenues for a sports team? O Player contracts O Rent paid to the city for the stadium Sponsorship contracts for in-stadium advertising O Interest paid out Question 17 Which of the following characteristics differentiate a liquid and a hard asset? O The color of the asset O Length of time before being able to sell the asset O Ease of turning into cash Both the 2nd and 3rd answer are correct. O None of the above None of the above. when a nucleus of 235u undergoes fission, it breaks into two smaller, more tightly bound fragments. part a calculate the binding energy per nucleon for 235u The following is the list of balances extracted from the ledger of CHINEDU & COMPANY, a sole Practitioner that is an Audit Firm as at 31 December, 2016. N Audit Fee Income 1,000,000 Consultancy Fee Income 2,000,000 Cash in Bank 1,650,000 Sundry Income 300,000 Capital 750,000 Administrative Expenses 600,000 Salaries & Allowances 800,000 Subscriptions 10,000 Retained profit Brought Forward 1,150,000 Professional Licence Renewal Fees 5,000 Rent 150,000 Stationery 250,000 Sundry Receivables 850,000 Transport & Travelling 75,000 Furniture & Fittings (Cost) 300,000 Motor Vehicle (Cost) 550,000 Newspapers & Journals 80,000 Rates 50,000 Provision for Depreciation- (M/V) 110,000 Provision for Depreciation (Furniture & Fittings) 60,000 Provision for Depreciation- (M/V) 110,000 Provision for Depreciation- (Furniture and Fittings) 60,000 You are required to prepare a Trial Balance of the firm as at 31December, 2016