The MSE for the regression models developed in parts (b) and (d) is Ŷ = 5.10 + 0.83X
Let's assume that the dependent variable in both models is denoted by Y, and the independent variable is denoted by X. The regression model developed in part (b) is expressed as:
Y = 5.10 + 0.83X
The regression model developed in part (d) is expressed as:
Y = 4.90 + 0.89X + 0.012X²
To calculate the MSE for the model developed in part (b), we need to first calculate the predicted values of Y using the equation:
Ŷ = 5.10 + 0.83X
Then, we can calculate the squared difference between the predicted value Ŷ and the actual value Y for each data point, and take the average of these squared differences. This gives us the MSE for the model developed in part (b).
Similarly, to calculate the MSE for the model developed in part (d), we need to first calculate the predicted values of Y using the equation:
Ŷ = 4.90 + 0.89X + 0.012X^2
Then, we can calculate the squared difference between the predicted value Ŷ and the actual value Y for each data point, and take the average of these squared differences. This gives us the MSE for the model developed in part (d).
After calculating the MSE for both models, we can compare them to determine which model is more effective. A lower MSE indicates that the model is more accurate in predicting the dependent variable.
Therefore, the model developed in either part (b) or (d) with the lower MSE is considered to be more effective.
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in question 3, determine if the work is correct or incorrect: v =bh v=26.01(5.1) v=132.651 in3
All the work is correct since the volume of the cube is 132.651 cubic inches as it is given.
From the given figure we can see that,
Length of the base (L) = 5.1 inches.
Width of the base (W) = 5.1 inches.
The Area of the Base of the Cube = (B) = L*W = 5.1*5.1 = 26.01 square inches.
The height of the cube (h) = 5.1 inches.
The Volume of the Cube is given by,
V = B*h
V = 26.01(5.1)
V = 132.651 cubic inches.
Hence the work is correct, the volume of the cube is 132.651 cubic inches.
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The question is incomplete. The complete question will be -
"determine if the work is correct or incorrect:
"
If f(x) = x³ 3x² - 22x + 24 and x - 6 is a factor of f(x), then find all of the zeros of f(x) algebraically.
Answer:
x = (3 ± sqrt(-47)) / 2.
Step-by-step explanation:
If x - 6 is a factor of f(x), then we know that (x - 6) must divide evenly into f(x), which means that there is another factor of f(x) that we can find by polynomial long division or synthetic division.
Using synthetic division:
We start by writing the coefficients of f(x) in order:
1 3 -22 24
We then write the factor (x - 6) to the left of the coefficients, and draw a line:
6 | 1 3 -22 24
We bring down the first coefficient: 1
1 3 -22 24
1
We multiply 6 by the first coefficient and write the result under the second coefficient: 1
6 | 1 3 -22 24
-6
-3
If x - 6 is a factor of f(x), then we know that (x - 6) must divide evenly into f(x), which means that there is another factor of f(x) that we can find by polynomial long division or synthetic division.
Using synthetic division:
We start by writing the coefficients of f(x) in order:
1 3 -22 24
We then write the factor (x - 6) to the left of the coefficients, and draw a line:
6 | 1 3 -22 24
We bring down the first coefficient:
Copy code
1
6 | 1 3 -22 24
1
We multiply 6 by the first coefficient and write the result under the second coefficient:
Copy code
1
6 | 1 3 -22 24
-6
Copy code
-3
We add the second and third coefficients to get -19, then multiply by 6 and write the result under the third coefficient:
1
6 | 1 3 -22 24
-6
-3
42
66
We add the last two numbers to get 90. This means that we can write f(x) as:
f(x) = (x - 6)(x² - 3x + 14)
To find the zeros of f(x), we need to solve the equation (x - 6)(x² - 3x + 14) = 0.
The first factor gives us x = 6.
To solve the quadratic factor, we can use the quadratic formula:
x = (-b ± sqrt(b² - 4ac)) / 2a
In this case, a = 1, b = -3, and c = 14. Substituting these values into the formula, we get:
x = (3 ± sqrt(3² - 4(1)(14))) / 2(1)
x = (3 ± sqrt(-47)) / 2
Since the square root of a negative number is not a real number, the quadratic factor does not have any real zeros.
Therefore, the zeros of f(x) are x = 6, and the complex numbers x = (3 ± sqrt(-47)) / 2.
Cheyenne has a home insured for $324,484. It would cost $409,087 to rebuild her home. If she has home insurance that provides personal property coverage at 80% of value, how much of her household belongings would be covered? State you answer to the nearest whole dollar. Do not include the $ symbol or any commas
$259,587 of Cheyenne's household belongings would be covered.
What is the percentage?
A percentage that represents a tenth of a quantity. One percent, denoted by the symbol 1%, is equal to one-hundredth of something; hence, 100 percent denotes the full thing, and 200 percent designates twice the amount specified. A portion per hundred is what the percentage denotes. The percentage refers to one in a hundred. The % sign is used to denote it.
The amount of personal property coverage provided by the insurance is 80% of the insured value of the home:
Personal property coverage = 0.8 x insured value of home
Personal property coverage = 0.8 x $324,484
Personal property coverage = $259,587.20
Therefore, $259,587 of Cheyenne's household belongings would be covered.
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Blanca buys 2gallons of green paint she uses 51\2 quarts on her front patch and her swing. How many quarts does she have left
Two gallons, or eight quarts, of green paint were purchased by Blanca. She still has 2 and 1/2 quarts of paint after using 5 and a half quarts.
The 2 gallons of green paint that Blanca bought can be divided into 8 quarts.
She applied 5 and 1/2 liters of paint to her front patch and swing.
We can deduct the amount utilized from the initial amount to get the amount of paint she still has.
8 quarts minus 5 and a half quarts equals 2 and a half quarts.
It's crucial to remember that having extra paint on hand for touch-ups or unforeseen scenarios is always a smart idea when working with paint.
Blanca may want to consider purchasing an additional quart of paint to ensure she has enough for her project.
Hence, Blanca still has 2 and 1/2 quarts of paint after using 5 and a half quarts.
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The table shows a proportional relationship.
x 12 8 24
y 3 2 6
Describe what the graph of the proportional relashion ship would look like.
Answer:
I believe it is D. A line passes through the point (0, 0) and continues through the point (12, 3).
Step-by-step explanation:
Please give brainliest thx
Every child at a restaurant is given one balloon, and one toy. The tree diagram shows all the different combinations of one color of balloon and one type of toy. A child may receive how many different combinations of one color of balloons in one type of toy made a child receive?
Without a visual of the tree diagram mentioned in the problem, it is difficult to provide an exact answer. However, we can use the fundamental counting principle to determine the number of possible combinations.
If there are, for example, 4 colors of balloons and 5 types of toys, then the number of different combinations a child may receive would be:
4 (number of colors) x 5 (number of types of toys) = 20
Therefore, the child may receive 20 different combinations of one color of balloon and one type of toy. However, this number may vary depending on the actual number of colors and types of toys available.
Please help! The image is down below.
Answer:
Since complete angle B (<DBA) is = <DBC + <CBA
<DBA = 20° + 30°
<DBA = 50°
Hence complete angle B is 50°
what is a polynomial of the 5th degree with a leading coefficient of 7 and a constant term 6
Answer: A polynomial of the 5th degree with a leading coefficient of 7 and a constant term of 6 can be expressed in the following form:
f(x) = 7x^5 + ... + ... + ... + ... + 6
Step-by-step explanation: Since the polynomial has a degree of 5, it will have 6 terms in total, including the constant term. However, the other coefficients are unknown, so we need more information to determine them. For example, we could be given additional roots or points on the curve.
Without any further information, the polynomial can only be expressed in this general form.
1.)
Joel is 6 ft tall. He notices that the distance from the top of his head to the tip of his shadow is 16 ft. What is the measure x of the angle that his shadow makes with the hypotenuse of the right triangle? Round the angle measure to the nearest whole number degree.
(Use an inverse trig function)
2.)
Which formula (Pythagorean Theorem) can be used to find length of Joel’s shadow?
A.) 6^2 + x^2 + 16^2
B.) 6^2 + x^2 = 16^2
C.) 6^2 + 16^2 = x^2
D.) x^2 + 16^2 = 6^2
Part(1)
The measure of the angle will be 45°.
Part(2),
The formula for the shadow is,
6² + x² = 16²
A basic mathematical theorem relating to the lengths of a right-angled triangle's sides is known as the Pythagorean theorem. According to this rule, the square of the length of the hypotenuse (the side that faces the right angle) in any right-angled triangle equals the sum of the squares of the lengths of the other two sides.
Part(1),
To find the angle x, we can use the inverse tangent function. Let's call the length of Joel's shadow "s". Then we have:
tan(x) = opposite/adjacent = 16/s
Taking the inverse tangent of both sides, we get:
x = tan⁻¹(16/s)
We know that Joel's height is 6 ft, so the hypotenuse of the right triangle formed by Joel and his shadow is:
= √(6² + s²)
Now we can use the Pythagorean Theorem to solve for s. Rearranging the formula for h, we have:
s = √(h² - 6²)
Substituting the value of h with the expression above, we get:
s = √((√(6² + s²))² - 6²)
Simplifying this expression, we get a quadratic equation in terms of s:
s² - 256 = 0
Solving for s, we get:
s = ±16
Since s represents the length of the shadow, it must be positive. Therefore, s = 16 ft.
Substituting s into the equation for x, we get:
x = tan⁻¹(16/16) = tan⁻¹(1) = 45°
So the measure of the angle x is 45 degrees.
Part(2),
The formula for a shadow can be written as,
6² + x² = 16²
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a dice game involves rolling 2 dice. if you roll a 2,3,4,10,11 or a 12 you win $5.00. if you roll a 5,6,7,8 or 9 you lose $5.00. how would you setup the problem to determine the expected value you win (or lose) per game?
The expected value represents the losing amount per game equals to $0.55.
Number of dice rolled = 2
To win $5.00 ,
Roll 2,3,4,10,11 or a 12
To lose $5.00 ,
Roll 5,6,7,8 or 9
Probability of winning or losing on a single roll of 2 dice.
There are 36 possible outcomes when rolling 2 dice.
Since each die has 6 possible outcomes.
Out of these 36 possible outcomes.
There are 6 ways to roll a 7 which is a loss.
And 10 ways to roll a 6 or an 8 also a loss.
Total of 16 losing outcomes.
Similarly, there are 5 ways to roll a 2 or a 12 which is a win.
4 ways to roll a 3 or an 11 also a win.
and 3 ways to roll a 4 or a 10 another win.
Total of 12 winning outcomes.
The probability of winning is 12/36 = 1/3
= 0.3333 approximately.
The probability of losing is 16/36 = 4/9
= 0.4444 approximately
The amount of money you can expect to win or lose on a single game,
If you win, you receive $5.00.
If you lose, you lose $5.00.
The expected value you win or lose per game is
Expected value
= (Probability of winning x Amount won) - (Probability of losing x Amount lost)
⇒ Expected value = (1/3 x $5.00) - (4/9 x $5.00)
⇒ Expected value = ($1.67) - ($2.22)
⇒ Expected value = -$0.55
Therefore, on average expected value to lose $0.55 per game.
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24.
A
6
9
BY
B
C
Q. Line segment AB is tangent to circle C. What is the radius of the circle?
Answer:Without additional information about the circle C or the position of point C, it is not possible to determine the radius of the circle.
Step-by-step explanation:
A spinner with repeated colors numbered from 1 to 8 is shown. Sections 1 and 8 are purple. Sections 2 and 3 are yellow. Sections 4, 5, and 6 are blue. Section 7 is red.
Spinner divided evenly into eight sections with three colored blue, one red, two purple, and two yellow.
Determine the theoretical probability of the spinner not landing on red, P(not red).
0.125
0.250
0.675
0.875
The probability of not getting red is 87.5%.
Hence, The correct option is C.
We know that;
Probability = Number of favorable outcomes / Number of samples
Given that;
A spinner with repeated colors numbered from 1 to 8 is shown.
Sections 1 and 8 are purple. Sections 2 and 3 are yellow. Sections 4, 5, and 6 are blue. Section 7 is red .
You only have one of eight (1/8) evenly divided orange sections.
The rest is not red,
P = (1 - 1/8
P = 7/8
P = 0.875
P = 87.5%
Therefore, spinning once will yield 7/8 odds of not landing on red are,
⇒ 0.875 or 87.5%.
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Could someone tell me the answer to this question
The number of elements in power set A where A = { x: x² + 3 < 2, x ∈R } is equal to n[P(A)] = 1.
The set A represented as ,
A = { x: x² + 3 < 2, x ∈R }
First, we need to determine the set of values that satisfy the inequality
x² + 3 < 2.
Subtracting 3 from both sides of the inequality gives us,
⇒ x² < -1
However, this inequality has no real solutions, since the square of any real number is always non-negative.
This implies,
The set A is empty, A = {}.
The power set of the empty set contains only the empty set itself,
so P(A) = {{}}.
This implies, the number of elements in P(A) denoted as n[P(A)] is 1.
Therefore, the number of elements in power set A is equal to n[P(A)] = 1.
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Karim and ali looked at the following expression and made a comment: 2-3= (-1) karim:whole numbers are not closed under subtraction. Ali: integers are closed under subtraction. Why do they have different conclusions about the closure property for the whole numbers and integers
The closure property for subtraction holds for integers, but not necessarily for whole numbers.
Closure property is an important concept in mathematics. It refers to the property of a set of numbers to produce a result within the same set when a mathematical operation is performed on any two numbers in that set.
Whole numbers are a subset of integers and include only non-negative numbers, whereas integers include both positive and negative numbers along with zero.
When we subtract two whole numbers, the result may not always be a whole number. For instance, if we subtract 3 from 2, the result is -1, which is not a whole number. This is why Karim concluded that whole numbers are not closed under subtraction.
On the other hand, when we subtract two integers, the result will always be an integer. For example, if we subtract 3 from 2, the result is -1, which is an integer. This is why Ali concluded that integers are closed under subtraction.
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A hemisphere is one half of a sphere the top of the silo is a hemisphere with a radius of 12 feet what is the volume of the silo?
The volume of the silo is 3612.56 cubic feet, under the condition that sphere in the top of the silo is a hemisphere with a radius of 12 feet.
Here, we have to implement the formula for deriving the volume of hemisphere,
The volume of a hemisphere with radius 12 feet can be calculated using the formula for the volume of a hemisphere which is (2/3)πr³
here r = radius of the hemisphere.
Staging r=12 feet in the formula
(2/3)π(12 feet)³
= (2/3)π(1728 cubic feet)
= 1152π cubic feet
≈ 3612.56 cubic feet
Then, the volume of the silo is approximately 3612.56 cubic feet.
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21. Select Yes or No to indicate whether each ordered pair is a point of intersection between the line y = 2x + 4 and the parabola y = x² + 4x + 1
Ordered Pairs
(-3,-2)
(1,6)
(0,4)
Yes (-3,-2) is true.
No (1,6) is false
No (0,4) is false
How to determine the ordered pairTo determine if an ordered pair is a point of intersection between the line and the parabola, we need to check if the coordinates satisfy both equations.
(-3, -2)
y = 2x + 4 => -2
= 2(-3) + 4 => -2 = -2 (True)
y = x² + 4x + 1 => -2
= (-3)² + 4(-3) + 1 => -2 = -2 (True)
Answer: Yes
(1, 6)
y = 2x + 4 => 6
= 2(1) + 4 => 6 = 6 (True)
y = x² + 4x + 1 => 6
= (1)² + 4(1) + 1 => 6 ≠ 6 (False)
Answer: No
(0, 4)
y = 2x + 4 => 4
= 2(0) + 4 => 4 = 4 (True)
y = x² + 4x + 1 => 4
= (0)² + 4(0) + 1 => 4 ≠ 1 (False)
Answer: No
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we are interested in the correlation between age in years and score on a driving test (0-100). we ran a shapiro-wilk test and obtained a p-value of .001 for driving test score. what is the appropriate test?
The appropriate test to use for examining the correlation between age in years and score on a driving test (0-100) is the Pearson correlation coefficient test, assuming the data meets the assumptions of normality and linearity.
Based on the information provided, the appropriate test to use would be the Pearson correlation coefficient test, which is used to measure the strength and direction of the linear relationship between two continuous variables.
However, before conducting the Pearson correlation test, it is important to ensure that the data meets the assumptions of normality and linearity. The Shapiro-Wilk test you ran assesses normality, but you need to also check for linearity.
If the data meets the assumptions of normality and linearity, you can then use the Pearson correlation test to determine the strength and direction of the relationship between age and driving test score.
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Find the ratio of the area of triangle XBY to the area of triangle ABC for the given measurements, if BY = 3, YC = 2 3/2 9/25 9/4
The ratio of the area of triangle XBY to the area of triangle ABC is 9/25. The height of XBY with respect to BY is 24/7, and the height of ABC with respect to BC is 40/7.
To find the ratio of the area of triangle XBY to the area of triangle ABC, we need to first find the heights of both triangles with respect to base BC.
Let's use the formula for the area of a triangle
Area = 1/2 * base * height
For triangle ABC, the base is BC, which has length 5, and let h₁ be the height of triangle ABC with respect to BC.
Area of ABC = 1/2 * 5 * h₁
For triangle XBY, the base is BY, which has length 3, and let h₂ be the height of triangle XBY with respect to BY.
Area of XBY = 1/2 * 3 * h₂
Since the triangles share the same base, we can use the following proportion to find the ratio of their heights
h₁/h₂ = BC/BY
h₁/h₂ = 5/3
We can solve for h₂
h₂ = (3/5)h1
Now, we need to find h1. We can use the fact that the area of triangle ABC is equal to the sum of the areas of triangles ABY and BCY.
Area of ABC = Area of ABY + Area of BCY
1/2 * 5 * h₁ = 1/2 * 3 * (3+h2) + 1/2 * 2 3/2 * (2 3/2 - h₂)
Simplifying the above equation and substituting h₂ = (3/5)h1, we get
5h₁ = 3(3 + 8/5 h₁) + 3h₁/5
Solving for h1, we get
h₁ = 40/7
Substituting h₁ = 40/7 and h₂ = (3/5)h₁ = 24/7 into the formulas for the areas of the triangles, we get
Area of ABC = 1/2 * 5 * 40/7 = 100/7
Area of XBY = 1/2 * 3 * 24/7 = 36/7
Therefore, the ratio of the area of triangle XBY to the area of triangle ABC is
Area of XBY / Area of ABC = (36/7) / (100/7) = 9/25
Hence, the required ratio is 9/25.
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From canoeville it is 2.4 km to white beach and 3.0 kilometers to the lodge. How far is it from white beach across the lake to the lodge
Answer:
it is 5.4 kilometers from White Beach across the lake to the Lodge.
Step-by-step explanation:
Based on the information provided, we can calculate the distance from White Beach across the lake to the lodge by adding the distances from Canoeville to White Beach and from Canoeville to the lodge.
Distance from Canoeville to White Beach: 2.4 km
Distance from Canoeville to the Lodge: 3.0 km
Total distance from White Beach across the lake to the Lodge:
2.4 km + 3.0 km = 5.4 km
So, it is 5.4 kilometers from White Beach across the lake to the Lodge.
What was the TOTAL amount deducted from Hope's latest paycheck?
Note that the TOTAL amount deducted from Hope's latest paycheck is $315.21
Why is this so?If you examine the paycheck it clearly states under current deductions, that 315.21 was deducted form hopes paycheck.
A paycheck is a written document (a cheque) provided by an employer to pay an employee for services done. It is sometimes spelled paycheque, pay check, or pay cheque.
Employers withhold (or deduct) a portion of their employees' wages to meet payroll and income taxes. A portion of a paycheck may also be removed or withdrawn to pay for retirement or health benefits.
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Full Question:
Although part of your question is missing, you might be referring to this full question:
What was the TOTAL amount deducted from Hope's latest paycheck?
answer choices
$90.00
$284.79
$315.21
$600.00
i am so confused i need help asap !! giving 30 points!!
The figure have area of the hexagon equal to 432 cm², area of the circle equal to 254.6 cm², and the area of the shaded region equal to 177.4 cm² to the nearest tenth.
How to calculate for the areasArea of the hexagon = 1/2 × 6 × 16cm × 9cm
Area of the hexagon = 432 cm²
Area of the circle = 22/7 × 9cm × 9cm
Area of the circle = 254.6 cm²
Area of the shaded region = 432 cm² - 254.6 cm²
Area of the shaded region = 177.4 cm²
Therefore, the figure have area of the hexagon equal to 432 cm², area of the circle equal to 254.6 cm², and the area of the shaded region equal to 177.4 cm² to the nearest tenth.
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15 Carousel
A carousel has three rings of wooden horses fixed to a circular platform,
which rotates anticlockwise around a central pole. The inner ring of
horses is 1.5 metres from the pole, and the middle ring of horses is 2.41
metres from the pole. (Distances are between the centre of the pole and
the centres of the horses.) Sisters Etsuko and Bachico sit on horses next
to each other on
The ride starts slowly but reaches maximum speed during the first rev
olution. At the end of the first revolution, the siblings wave to their
mother who is then directly alongside them. The carousel continues to
rotate at the maximum speed until they have passed their mother a
further 16 times. The carousel then slows down and stops without the
siblings passing their mother again. The time between the first and last
time the siblings passed their mother was 6 minutes.
a Etsuko sits on a horse on the inner ring. Calculate Etsuko's maximum
speed in metres per second to 2 decimal places.
b Bachico sits on a horse on the middle ring. Calculate how many times
faster she is travelling compared to Etsuko.
e The safety regulations for carousels state that the maximum speed at
which it is safe for a child to sit on a horse without flying off is 1.5
metres per second. Find the maximum distance from the pole to the
outer ring of horses to the nearest centimetre.
d In the UK and Australia carousels are typically called merry-go-rounds.
and rotate clockwise. There is a merry-go-round near the carousel
that Bachico and Etsuko are riding. Bachico's friend Sakura is riding
the merry-go-round, which travels at 2 revolutions per minute. At
certain times they were as close as possible, that is, simultaneously
both on the imaginary straight line joining the two poles. Each time
this happened they screamed 'yay'. Find the time in seconds between
consecutive yays.
a) Etsuko's maximum speed is 4.19 m/s.
b) Bachico is traveling 1.61 times faster than Etsuko.
c) The maximum distance from the pole to the outer ring of horses is 3.56 meters.
d) The time between consecutive "yays" is 7.5 seconds.
How to solveLet's call the maximum speed of the carousel V. Then, the circumference of the circular path traveled by the outermost ring of horses is:
C = 2πr, where r is the distance between the pole and the outermost ring of horses.
The time it takes for the carousel to complete one revolution is:
T = C/V
We can use the information given in the problem to set up an equation for the total time it takes for the siblings to pass their mother 17 times:
T = T₁ + 16T₂ = 6 minutes = 360 seconds
So, the time it takes for Etsuko's horse to complete one revolution is:
T₁ = C₁/V
The distance that Etsuko's horse travels between consecutive passes of the mother is equal to the difference in the distances traveled by the innermost and middle rings of horses during one revolution, which is:
Δd = 2.41 - 1.5 = 0.91
So, the time it takes for the carousel to complete one revolution between subsequent passes of the mother is:
Solving for V, we get:
V = 4.19 m/s
Therefore, Etsuko's maximum speed is 4.19 m/s.
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Yue Bing is a new intern at LinkedIn. She has designed a new recommendation algorithm for connecting LinkedIn users to other users. She wants to see if the new recommendation algorithm will cause an increase in the average number of messages sent by LinkedIn users. She will randomly sample one group of users from the LinkedIn network and set up their accounts so that they use the new recommendation algorithm. She will then randomly sample another group of users, who will operate on the regular recommendation algorithm. She determines how many messages are sent by users over the course of a year.
Yue Bing provides you with the 95% confidence interval she computed for the difference between the two parameters relevant to the problem : (5.48, 8.72) messages per year. However, she doesn't know how to interpret what this means at all. Which statement below is a reasonable conclusion to draw from this confidence interval, at a 95% confidence level?
a. On average, all LinkedIn users would send fewer messages with the new algorithm than with the old algorithm.
b. On average, LinkedIn users would send between 5.48 and 8.72 total messages per year with the new algorithm.
c. There's not enough information to suggest that on average, all LinkedIn users would differ in the number of messages sent with the new algorithm than with the old algorithm.
d. On average, all LinkedIn users would send more messages with the new algorithm than with the old algorithm.
The correct answer is b. On average, LinkedIn users would send between 5.48 and 8.72 total messages per year with the new algorithm.
The 95% confidence interval provided by Yue Bing suggests that the true difference in the average number of messages sent per year between the two groups of users (those using the new algorithm and those using the old algorithm) is likely to be between 5.48 and 8.72. This means that we can be 95% confident that the true difference in the average number of messages sent per year falls within this range. It does not necessarily mean that all LinkedIn users will send more or fewer messages with the new algorithm, but rather that the average number of messages sent by users using the new algorithm is likely to be within this range.
Your answer: d. On average, all LinkedIn users would send more messages with the new algorithm than with the old algorithm.
Explanation: Yue Bing computed a 95% confidence interval for the difference between the two parameters, which is (5.48, 8.72) messages per year. Since the entire interval is positive, this indicates that the new recommendation algorithm likely leads to an increase in the average number of messages sent by LinkedIn users compared to the old algorithm.
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50% of 60
5% of 60
1%of 60
(50/100)×60= 30
(5/100)× 60= 3
(1/100)×60= 0.6
What percentage of matches has sparx FC won if they have won 11 games, drawed 3 and lost 6?
55% percentage of matches has sparx FC won.
We have,
Number of games won = 11
Drawed games= 3
Lost games= 6
So, the percentage of won
= 11 / 20 x 100
= 11 x 5
= 55%
Thus, 55% of games won.
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What is the unit for force? Give the equation for gravitational force- make sure to include units too. Does gravitational force increase or decrease as you move away from earth? Using the equation, what would happen if the radius between centers were to be cut in half?
The unit for force is the Newton (N). The equation for gravitational force is given by Newton's law of universal gravitation:
F = G * (m1 * m2) / r^2
where: F is the gravitational force (in Newtons, N) G is the gravitational constant (approximately 6.674 × 10^-11 N·m²/kg²) m1 and m2 are the masses of the two objects (in kilograms, kg) r is the distance between the centers of the masses (in meters, m)
Gravitational force decreases as you move away from Earth because the force is inversely proportional to the square of the distance (r^2) between the objects. If the radius between the centers (r) were to be cut in half, the gravitational force would increase by a factor of 4, since the force is inversely proportional to the square of the distance.
So if r becomes (1/2)r, the force would be inversely proportional to (1/4)r^2, leading to a 4 times increase in force.
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help me with this, this is for my 10-year-old brother he kept bugging me
The mean is 89, the median is 89, the mode is 89, and the range is 22.
The mean is 72.6, the median is 76, there is no mode, and the range is 25.
The mean is 60.5, the median is 57.5, there is no mode, and the range is 55.
What are the mean, median, mode, and range of the following data?The mean, median, mode, and range of the given data are calculated as follows:
Mean = sum of values/ number of values
The median is the middle score when the scores are arranged in order from lowest to highest
Mode is the number that occurs most
The range is the difference between the largest and smallest values
1. Mean = (98 + 89 + 76 + 93 + 89) / 5
Mean = 89
76, 89, 89, 93, 98
The median is 89.
The mode is also 89.
Range = 98 - 76
Range = 22
2. Mean = (59 + 63 + 84 + 76 + 81) / 5
Mean = 72.6
Median: 59, 63, 76, 81, 84
The median is 76.
There is no mode for this set of score
Range = 84 - 59
Range = 25
3. Mean = (36 + 48 + 67 + 91) / 4
Mean = 60.5
Median: 36, 48, 67, 91
Median = (48 + 67) / 2
Median = 57.5
The data has no mode
Range = 91 - 36
Range = 55
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At Jefferson High school there are 250 students who drive to school and 375 students who ride the bus to school. The number of students who drive to school is blank% of the number of students who ride the bus to school.
Answer: 40% drive and 60% take the bus.
Step-by-step explanation:
We will divide the number of students who drive to school by the total number of students, and then multiply by 100 to turn it into a percentage.
[tex]\displaystyle \frac{250}{250+375} *100= 40\%[/tex]
Next, we will divide the number of students who ride the bus to school by the number of students who ride the bus, and then multiply by 100 to turn it into a percentage.
[tex]\displaystyle \frac{375}{250+375} *100= 60\%[/tex]
If p(x) = 2ln(x)-1 and m(x) =ln(x+6), then what is the solution for p(x) = m(x)
Answer:
Step-by-step explanation:
To find the solution for p(x) = m(x), we need to set the two expressions equal to each other and solve for x:
2ln(x) - 1 = ln(x+6)
First, we can simplify the left side by using the logarithmic identity that states ln(a^b) = b ln(a):
ln(x^2) - 1 = ln(x+6)
Next, we can eliminate the natural logarithm by exponentiating both sides with the base e:
e^[ln(x^2) - 1] = e^[ln(x+6)]
e^[ln(x^2)] * e^[-1] = x + 6
x^2 * 1/e = x + 6
Multiplying both sides by e gives:
x^2 = e(x + 6)
Expanding the right side gives:
x^2 = ex + 6e
Rearranging gives:
x^2 - ex - 6e = 0
This is a quadratic equation in x. We can solve for x using the quadratic formula:
x = [e ± sqrt(e^2 + 4*6e)]/2
Simplifying gives:
x = [e ± sqrt(e^2 + 24e)]/2
Therefore, the solution for p(x) = m(x) is x = [e ± sqrt(e^2 + 24e)]/2.
Answer:
x ≈ 3.40295
Step-by-step explanation:
We want to find the value(s) of x that satisfy the equation p(x) = m(x), where p(x) = 2ln(x) - 1 and m(x) = ln(x + 6).
So, we have:
2ln(x) - 1 = ln(x + 6)
First, let's simplify the equation by using the properties of logarithms:
ln(x^2) - ln(e) = ln(x + 6)
ln(x^2/e) = ln(x + 6)
Now we can eliminate the natural logarithm by taking the exponential of both sides:
x^2/e = x + 6
x^2 - ex - 6e = 0
We can solve this quadratic equation using the quadratic formula:
x = [-(-e) ± sqrt((-e)^2 - 4(1)(-6e))] / (2(1))
Simplifying:
x = [e ± sqrt(e^2 + 24e)] / 2
Therefore, the solutions for p(x) = m(x) are:
x = [e + sqrt(e^2 + 24e)] / 2 or x = [e - sqrt(e^2 + 24e)] / 2
Note that since the argument of the natural logarithm must be positive, we must discard the negative solution, which is not valid. So the only solution is:
x = [e + sqrt(e^2 + 24e)] / 2
We can approximate this value using a calculator or computer software. For example, if we use e = 2.71828, we get:
x ≈ 3.40295
Therefore, the solution for p(x) = m(x) is x ≈ 3.40295.
Keisha runs 8 miles in 84 minutes. At the same rate, how many minutes would she take to run 6 miles?
Answer: 63 minutes
Step-by-step explanation:
Use proportions:
8/84 = 6/x
Cross multiply to get:
8x = 504
Simplify by dividing by 8 on both sides.
x = 63.
