A simple random sample of size n=36 is obtained from a population that is skewed right with µ=87 and σ=24. (a) describe the sampling distribution of x.

Answers

Answer 1

From central limit theorem, in a sample

a) the sampling distribution of x is normal distribution.

b) The value of P(x>91.3) is equals to the 0.093418.

From the central limit theorem, when the samples of a population are considered then these generate a normal distribution of their own. The sample size must be equal to or higher than 30 in order for the central limit theorem to be true. We have a simple random sample obtained from population with the Sample size, n = 36

Population is skewed right with population mean, µ= 87

Standard deviations, σ = 24

We have to determine the sampling distribution of x.

a) As we see sample size, n = 36 > 30, so the sampling distribution is normal distribution.

b) Using the test statistic value for normal distribution, [tex]z= \frac{ x - \mu }{\frac{\sigma}{\sqrt{n}}} [/tex]. Here, x = 91.3, µ= 87, σ = 24, n = 36. Now, the probability value is, P(x>91.3)

= [tex]P( \frac{ x - \mu }{\frac{\sigma}{\sqrt{n}}} < \frac{ 91.3 - 87 }{\frac{24}{\sqrt{36}}}) [/tex]

= [tex]P(z < \frac{ 4.3}{\frac{24}{6}} )[/tex]

= [tex]P(z < \frac{ 4.3}{4} )[/tex]

= [tex]P(z < 1.32)[/tex]

Using the p-value calculator, the value P(z < 1.32) is equals to the 0.093418. So, P( x < 91.3 ) = 0.093418. Hence, required value is 0.093418.

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Complete question:

A simple random sample of size n=36 is obtained from a population that is skewed right with µ=87 and σ=24.

(a) describe the sampling distribution of x.

b) What is P(x>91.3)?


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Which one of the following foods is the top source of protein chosen by Americans in the United States?

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What are the options?

Answer:

The correct answer is beef

Step-by-step explanation:

I took the quiz and got it correct

The domain of this function is {-12,-6,3,15}. Y=-2/3x+7
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Considering the given function, the table is completed as follows:

x|y

-12|15

-6| 11

3|5

15|-3

Which is the function?

The function is defined by:

[tex]y = -\frac{2}{3}x + 7[/tex]

Hence, when x = -12:

[tex]y = -\frac{2}{3}(-12) + 7 = 15[/tex]

When x = -6:

[tex]y = -\frac{2}{3}(-6) + 7 = 11[/tex]

When x = 3:

[tex]y = -\frac{2}{3}(3) + 7 = 5[/tex]

When x = 15:

[tex]y = -\frac{2}{3}(15) + 7 = -3[/tex]

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Select the correct answer. A linear function graph of the x-axis and y-axis has a diagonal line that passes the x-axis at (minus 0.5, 0), and the y-axis at (0, 1) In the function above, the slope will be multiplied by , and the y-value of the y-intercept will be increased by 3 units. Which of the following graphs best represents the new function?

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Answer: Graph Y

Step-by-step explanation:

An angle measures 8.8° more than the measure of its complementary angle. What is the measure of each angle?

Answers

Based on the definition of complementary angles, the two angles are: 49.4° and 40.6°.

What are Complementary Angles?

Angles that are complementary angles have a sum of 90 degrees.

Let the angle be represented as x

Complement of the angle = (90 - x)

Therefore, we would have:

x = (90 - x) + 8.8

x = 90 - x + 8.8

x = 98.8 - x

x + x = 98.8

2x = 98.8

x = 98.8/2

x = 49.4°

The second angle would be: 90 - 49.4 = 40.6°

The angles are 49.4° and 40.6°.

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On a normal distribution of iq test scores, the average score would be:

Answers

The average IQ test score would be 100.

What is a normal distribution?

A probability distribution that is symmetric about the mean or average is the normal distribution, sometimes referred to as the Gaussian distribution. It demonstrates that data that are close to the average value occur more frequently than data that are far from the mean. The normal distribution appears as a "bell curve" on a graph.

Average IQ Score

A score of 100 is regarded as the average IQ on various tests. The majority of results (68%) are within one standard deviation of the mean (that is, between 85 and 115). This indicates that the average result is within plus or minus 15 points for almost 70% of test takers.

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Select the correct equation.
The focus and directrix of a parabola are shown. What is the equation of the parabola?

Answers

Check the picture below, so the parabola looks more or less like that one, with a "p" distance of 2 units that is positive, whilst the vertex, which is always half-way between the focus point and the directrix is where you see it there, thus

[tex]\textit{horizontal parabola vertex form with focus point distance} \\\\ 4p(x- h)=(y- k)^2 \qquad \begin{cases} \stackrel{vertex}{(h,k)}\qquad \stackrel{focus~point}{(h+p,k)}\qquad \stackrel{directrix}{x=h-p}\\\\ p=\textit{distance from vertex to }\\ \qquad \textit{ focus or directrix}\\\\ \stackrel{"p"~is~negative}{op ens~\supset}\qquad \stackrel{"p"~is~positive}{op ens~\subset} \end{cases} \\\\[-0.35em] ~\dotfill[/tex]

[tex]\begin{cases} h=-1\\ k=2\\ p=2 \end{cases}\implies 4(2)( ~~ x-(-1) ~~ )~~ = ~~(y-2)^2\implies 8(x+1)=(y-2)^2 \\\\\\ x+1=\cfrac{1}{8}(y-2)^2\implies \boxed{x=\cfrac{1}{8}(y-2)^2-1}[/tex]

Answer: UR WELCOME

Step-by-step explanation: ANSWER ON EDMENTUM

Which piece of additional information can be used to prove triangle cea triangle cdb

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Answer:

well I don't get the question

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The given magic numbers are placed in the appropriate squares, so that the sum in each row, column and diagonal is all equal as shown below.

How to place the numbers in a magic square?

First of all, we would rewrite all the rational numbers in their lowest forms:

32/38 = 16/1918/38 = 9/194/38 = 2/19-14/-38 = -7/-1924/38 = 12/19104/52 = 2/170/95 = 14/1925/95 = 5/1922/38 = 11/19-16/-38 = -8/-1960/114 = 10/19-18/-57 = -6/-19-21/-133 = -3/-1945/57 = 15/19

Next, we would write the sum of the numbers in each row as follows:

First row: 16/19 + 9/19 + 2/19 + (-7/-19) = 34/19

Second row: (-6/-19) + (-3/-19) + 12/19 + 2/1 = 34/19

Third row: 11/19 + 14/19 + 5/19 + (-4/-19) = 34/19

Fourth row: 1/19 + (-8/-19) + 15/19 + 10/19 = 34/19

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help pls im so confused
10(1^2*2^-2)

Answers

Answer:

2.5

(or 5/2 or 2 1/2)

Step-by-step explanation:

Remember PEMDAS

10 * (1^2 * 2^-2)

10 * (1 * 0.25)

10 * 0.25 =

2.5

The polygon circumscribes the circle. Which of the following is the perimeter of the polygon?
A. 39 cm
B. 56 cm
C. 61 cm
D. 78 cm

Answers

The perimeter of the polygon that circumscribes the circle is 78 cm

What is an equation?

An equation is an expression that shows the relationship between two or more variables and numbers.

The circle tangent theorem states that tangents which meet at the same point are equal in length. Hence:

The missing lengths are 8, 6, 9 and 16.

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The perimeter of the polygon that circumscribes the circle is 78 cm

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How to find the answers?​

Answers

The computation shows that the value of blue which is represented by x is 12.

How to calculate the value?

From the information given, it was stated that 30 people were in the kindergarten.

Green = 10

Red = 8

Blue (x) = 30 - (10 + 8)

= 30 - 18

= 12

Since the teacher want to paint the class with the most favorite color, the appropriate color to use will be blue.

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Mrs. Anderson had twice as many chickens as ducks. she sold 272 chickens and 16 ducks. She then had half as many chickens as ducks. How many chickens does she have?

Answers

The number of chickens she had was 352

Applications of equations

From the question, we are to determine the number of chicken she has

Let c represent chicken

and d represent ducks

From the given information,

Mrs. Anderson had twice as many chickens as ducks

c = 2d ---------- (1)

She sold 272 chickens and 16 ducks and then had half as many chickens as ducks

(c-272) = 1/2(d -16) ---------- (2)

Put equation (1) into (2)

2d - 272 = 1/2(d - 16)

2(2d - 272) = d- 16

4d - 544 = d - 16

4d - d = 544 - 16

3d = 528

d = 528/3

d = 176

Substitute the value of d into equation (1)

c = 2d

c = 2(176)

c = 352

Hence, the number of chickens she had was 352

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Matt's family traveled 3/8 of the distance to his grandmother’s house on Saturday. They traveled 3/5 of the remaining distance on Sunday. What fraction of the total distance to his grandmother’s house was traveled on Sunday?

Answers

Answer:

3/8

Step-by-step explanation:

Let's use a sample number of 100 miles

If 3/8 was traveled the first day, then 37.5m were traveled on the first day.

Now on Sunday, there are 62.5m remaining in the trip. They travel 3/5 of that, meaning they went 62.5 * 3/5m. This turns out to be 37.5 miles that were traveled on Sunday.

37.5/100 = 3.8

Express in standard form : 4786.3460

Answers

Answer:round to nearest hundredth (4,786.3)

Step-by-step explanation:

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all numbers less than 7 and greater than 7

Answers

Step-by-step explanation:

123456 less then 7

unlimited greater then 7

The numbers from negative infinity to 7, excluding 7."are less than 7 and "all numbers from 7 to positive infinity, excluding 7" are more than 7.

The combination of positive, negative numbers including 0  are called as integers.

The numbers less than 7 are:

This set includes all real numbers that are strictly less than 7.

It can be denoted as (-∞, 7), which means "all numbers from negative infinity to 7, excluding 7."

The numbers greater than 7 are:

This set includes all real numbers that are strictly greater than 7. It can be denoted as (7, +∞), which means "all numbers from 7 to positive infinity, excluding 7."

Thus, there are infinite numbers which are less than 7 and more than 7.

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Use a triple integral to find the volume of the wedge bounded by the parabolic cylinder yx and the planes zy and z0.

Answers

The volume of wedge is 4/15 by use of Triple integral.

According to the statement

we  have to find the volume of wedge which is bounded by the parabolic cylinder.

So, because of the given shape of z=√y

the plane y=0 is a boundary, in addition to the given x = 0, z = 0.

so we are in the first octant for all of this. and the further constraint is the plane x + y = 1

Triple integrals are 3 successive integrations, used to calculate a volume, or to integrate in a 4th dimension, over 3 other independent dimensions.

but as a triple integral you would write:

∫x=0 ∫y=0∫z=0 dz dy dx

And after put the values in it and solving it we get the

[−4/15(1−x)^5/2] at x=0

Then after that the answer will become 4/15.

So, The volume of wedge is 4/15 by use of Triple integral.

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PLEASE HELP 80 POINTS!!!!!

Answers

Answer: reflection across x axis and y axis?

Step-by-step explanation: repost question with the possible answers!

Find the missing side length in the image below.

Answers

Answer:

6 is the ?

Step-by-step explanation:

find the number set which satifies each of the problems If 20 is added to the number, the absolute value of the result is 6

Answers

Answer:

{-14,-26}

Step-by-step explanation:

lx+20l=6

So x+20 is either 6 or -6

x=6-20=-14

x=-6-20=-26

determine the slope of the line

Answers

Answer:

slope = 2

Step-by-step explanation:

calculate the slope m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (- 3, 0) and (x₂, y₂ ) = (0, 6) ← 2 points on the line

m = [tex]\frac{6-0}{0-(-3)}[/tex] = [tex]\frac{6}{0+3}[/tex] = [tex]\frac{6}{3}[/tex] = 2

can someone please help me

Answers

The answer is 280 degrees.

Use the graph to find the solution.

Given the graph of w(x), w(2) = ?

(the graph is below)

THE FIRST ANSWER WILL GET BRAINLIEST OR 5 STARS! PLEASE ANSWER QUICK :)

Answers

Answer:

W(2) = 5

Step-by-step explanation:

Because when you look at the graph, the y value is 5 when the x value is 2.

Answer:

w(2) = 5

Step-by-step explanation:

by using rise over run to find the slope easily, you get a slope of 4 and an equation of w(x) = 4x - 3, -3 being the y-intercept

to calculate w(2):

w(2) = 4(2) - 3

w(2) = 8 - 3

w(2) = 5

or you could just look at when y is 2 and see that the corresponding x value is 5 but i wanted to provide a longer explanation in case :)

Question 6 of 25
A high school teacher grades a math test. She wants to see the numerical
grade of each student. Which item should she use so she can quickly see
how many students got each score?
A. None of these
B. Frequency table
OC. Line plot
OD. Pie chart

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The answer to this question is B

A school needs 4500 paperclips which are sold in boxes of 200 how many boxes must the school buy

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Answer:

23 there will be 100 paperclips leftover

23 paper clips and it’ll be left with 100

Angle 0 intersects the unit circle at point (-0.9483, -0.3173). What is the value of tan(0)

Answers

The tangent in the unit circle is equal to 0.334.

How to calculate the value of the function tangent with the help of a unit circle

In trigonometry, unit circles are representations of a circle with radius 1 and centered at the origin of a Cartesian plane commonly use to estimate and understand angles and trigonometric functions related to them.

Angles are generated by line segments whose coordinates are of the form (x, y), where x is the position of the terminal point along the x-axis and y is the position of the terminal point along the y-axis.

In addition, the tangent of the angle generated in a unit angle is defined by the following equation:

tan θ = y / x     (1)

If we know that x = - 0.9483 and y = - 0.3173, then the tangent of the angle generated in the unit circle is:

tan θ = (- 0.3173)/(- 0.9483)

tan θ = 0.334

The tangent in the unit circle is equal to 0.334.

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13. If 3x = xy - 5 and y = 6, what is the value of x? (A) (C) / (B) 3) - 5 (D) slas1 5 اقعا our win​

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Answer:

x = 5/3

Step-by-step explanation:

3x = xy - 55

3x = x*6 - 5

3x = 6x - 5

3x = 5

x = 5/3

The ratio of butter:flour:sugar in a recipe is 1:9:6. When using 8 cups of sugar in this recipe, how many total cups of ingredients will be used

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Answer:

21 and a third cups bxisjsbdn

What is the result of taking the difference between sample means, minus the null hypothesized difference, divided by the standard error of the difference between means?

Answers

The result of taking the difference between sample means, minus the null hypothesized difference, divided by the standard error of the difference between means is the t-statistic.

What is a t-statistic?

When deciding whether to accept or reject the null hypothesis in a T test, the t-statistic is used. It functions similarly to a Z-score in that you choose a cutoff point, calculate your t score, and then compare the two. When you have a limited sample size or don't know the population standard deviation, you utilize the t-statistic.

On its own, the t-statistic doesn't actually reveal much. Similar to how the word "average" is meaningless on its own without any context.

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You start driving west for 20 miles, turn left, and drive south for another 14 miles. At the end of driving, what is your straight line distance from your starting point? Round to the nearest tenth of a mile

Answers

by using these measurements and drawing out a triangle, you have two sides “a” and “b” and are trying to find “c”. using pythagorean theorem you can determine that “a^2 + b^2 = c^2”. plug in your distances (20 and 14) and you get 24.4 as your distance.

Answer:

24.4

Step-by-step explanation:

Which of the following values is not a perfect square?
a.81
b.125
c.49
d.100

Answers

Answer: b. 125

Step-by-step explanation:

Find the square roots of each, and if the square root is a decimal, it is not a perfect square.

Square root of 81: 9

Square root of 49: 7

Square root of 100: 10

That leaves 125.

Correct ANSWER
C:49
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