You are curious about the average number of yards Matthew Stafford throws for each game for the Detroit Lions. You randomly select 20 games and see that the average yards per game is 273.7 with a standard deviation of 31.64 yards. You want to create a 95% confidence interval for the true average number of yards per game he throws. What is the margin of error for this estimate

Answers

Answer 1

Answer:

The margin of error for this estimate is of 14.79 yards per game.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

T interval

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 20 - 1 = 19

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 19 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.95}{2} = 0.975[/tex]. So we have T = 2.093

The margin of error is:

[tex]M = T\frac{s}{\sqrt{n}}[/tex]

In which s is the standard deviation of the sample and n is the size of the sample.

You randomly select 20 games and see that the average yards per game is 273.7 with a standard deviation of 31.64 yards.

This means that [tex]n = 20, s = 31.61[/tex]

What is the margin of error for this estimate?

[tex]M = T\frac{s}{\sqrt{n}}[/tex]

[tex]M = 2.093\frac{31.61}{\sqrt{20}}[/tex]

[tex]M = 14.79[/tex]

The margin of error for this estimate is of 14.79 yards per game.


Related Questions

round to the nearest thousand 83,243 answer​

Answers

I think so the answer is 82000

Answer:

83,000

Step-by-step explanation:

Thousand = 1,000s place

1,000s place of 83,243 is the 3 (3,000)

The number right before 3 is the 2 (200)

2 is closer to zero than 10 so it rounds down

83,243 then becomes 83,000 since the other numbers before the (2) round down with it.

PLS HELP 50 POINTS

To find the amount of water that would fill the inside of an aluminum can, which of the following formulas would you use?

SA = 2 B + Ph
V = lwh
SA = 2 π r 2 + 2 π rh
V = π r 2h

Answers

Answer:

V = π r 2h

Step-by-step explanation:

The solution is, the volume of the cylinder in cubic centimeters

V = π(3.5)2h.

What is volume?

In mathematics, volume is the space taken by an object. Volume is a measure of three-dimensional space. It is often quantified numerically using SI derived units or by various imperial or US customary units. The definition of length is interrelated with volume.

The volume of a cylinder is given by the equation:

V = π(R)^^2*h

where π = 3.14, R is the radius and h is the height.

If in the image we see that the radius is 7, then the correct option is D.

If in the image we shee that the DIAMETER is 7 (a linear that goes from end to end of the circle and goes trough the middle) then we know that the radius is half of the diameter, 7/2 = 3.5

in this case he correct option is C.

Hence, The solution is, the volume of the cylinder in cubic centimeters

V = π(3.5)2h.

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complete question:

A cylinder and its dimensions are shown. Which equation can be used to find V, the volume of the cylinder in cubic centimeters?

A) V = π(3.5h)2

B) V = π(7h)2

C) V = π(3.5)2h

D) V = π(7)2h

Draw a Box Plot neatly (Box & Whisker, 5 Number Summary) to represent the following points scored by a basketball player 15, 8, 16, 10, 13, 2, 8, 12, 2, 5, 6, 8. Remember the number line has to have equal intervals. Make sure you include a title and any labels needed. Show all your work to find each value.

I will give brainliest

Answers

Ok brivybhjsjsjnnssbjejabwbbss

Graph the image of ABC with vertices A(2,3), B(-4,4), C(-1,-3) after the glide reflection.
Translation:(x,y)—>(x+2,y)
Reflection: in the x-axis

Answers

Given:

The vertices of the triangle ABC are A(2,3), B(-4,4), C(-1,-3).

Translation: [tex](x,y)\to (x+2,y)[/tex]

Reflection: in the x-axis.

To find:

The graph of the image.

Solution:

The vertices of the triangle ABC are A(2,3), B(-4,4), C(-1,-3).

The rule of translation is:

[tex](x,y)\to (x+2,y)[/tex]

The points after translations are:

[tex]A(2,3)\to A'(2+2,3)[/tex]

[tex]A(2,3)\to A'(4,3)[/tex]

[tex]B(-4,4)\to B'(-4+2,4)[/tex]

[tex]B(-4,4)\to B'(-2,4)[/tex]

[tex]C(-1,-3)\to C'(-1+2,-3)[/tex]

[tex]C(-1,-3)\to C'(1,-3)[/tex]

After that the figure is reflected across the x-axis. So, the rule of reflection is:

[tex](x,y)\to (x,-y)[/tex]

[tex]A'(4,3)\to A''(4,-3)[/tex]

[tex]B'(-2,4)\to B''(-2,-4)[/tex]

[tex]C'(1,-3)\to C''(1,3)[/tex]

The vertices of image are A''(4,-3), B''(-2,-4), C''(1,3).

A bakery sells 12 gourmet orange zest cupcakes for $36.00. Select all the statements that are true.

Answers

Since this bakery sells 12 gourmet orange zest cupcakes for $36.00, all the statements that are true include the following:

A. $3.00/1 is a unit rate for the cost per cupcake.

B. Using the same rate, the bakery can sell 2 dozen cupcakes for $72.00.

C. 36/12 represents the ratio of $36.00 for 12 cupcakes.

How to determine all of the true statements?

First of all, we would determine the unit rate for the cost per cupcake by using the following mathematical expression;

Unit rate = Cost of cupcake/number of cupcakes

Substituting the given parameters into the unit rate formula, we have the following;

Unit rate = $36.00/12

Unit rate = $3.00.

This ultimately implies that, the unit rate for the cost per cupcake is equal to $3.00.

Note: 1 dozen is equal to 12 pieces.

For the cost of 2 dozen cupcakes, we have the following:

Cost of 2 dozen cupcakes = 12 × 2 × 3

Cost of 2 dozen cupcakes = $72.00.

For the cost of 8 cupcakes, we have the following:

Cost of 8 cupcakes = 8 × 3

Cost of 8 cupcakes = $24.00.

For the cost of 6 cupcakes, we have the following:

Cost of 6 cupcakes = 6 × 3

Cost of 6 cupcakes = $18.00.

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Complete Question:

A bakery sells 12 gourmet orange-zest cupcakes for $36.00. Select all the statements that are true.

$3.00/1 is a unit rate for the cost per cupcake.

Using the same rate, the bakery can sell 2 dozen cupcakes for $72.00.

36/12 represents the ratio of $36.00 for 12 cupcakes.

Using the same rate, it would cost $24.50 for 8 cupcakes.

Using the same rate, the bakery can sell 6 cupcakes for $20.00.

Plz help me this is urgent!!

Answers

Answer:

This type of graph is B a stem graph

Answer:

B. Stem-and-leaf plot.

Step-by-step explanation:

A stem and leaf plot will typically have numbers on the left and right side, with a line separating the numbers. This graph is an example of a stem-and-leaf plot.

A line plot (example shown).

A bar graph (example shown).

A pictograph (example shown).

ILL GIVE BRAINLIEST

Given the diagram, which of the following must be true?

Answers

Answer:

Choice D

Step-by-step explanation:

QS ≈ TR

they have same direction, sense and magnitude

Answer:

B. QR ≅ TS

Step-by-step explanation:

Angle TR shows us that it is a right angle. Flip it to the other side as the inverse and we get the angle QR.

Factor completely, then place the answer in the proper location on the grid. a2 - 25b2

Answers

Step-by-step explanation:

a² - 25b² can be expressed as a² - (5²)b²

this gives us: a² - (5b)²

using difference of two squares, we have:

(a - 5b)(a + 5b)

NEED THE ANSWER ASAP!!

Answers

68 degrees because they’re vertical angles

Cubes having side lengths of 3/4in. are used to fill the right rectangular prism shown.

Answers

Answer:

36 cubes

Step-by-step explanation:

the pic is up there

pls help ASAP!! person with correct answer will be marked brainliest

Answers

Answer:

41.8°

Step-by-step explanation:

Opposite angles are equal.

Answer:

41.8 degrees

Step-by-step explanation:

They are vertical angles, meaning they are the same, just opposite one another.

The white Christmas tree is 7.55m tall.the green Christmas tree is twice as tall as the white Christmas tree which is 0.454m taller the golden Christmas tree. What is the total height of the 3:Christmas tree? A 37.296m b .372.96m.c.3729.6m.d.37296
help me guys​

Answers

The white Christmas tree is 7.55m

Green Christmas tree is twice as tall as white Christmas tree: 7.55 * 2 = 15.1m

High golden Christmas tree: 15.1m - 0.454m = 14.646m

The total height of 3 Christmas trees is: 7.55m + 15.1m + 14.646m = 37.296m

Choose: A 37.296m

Please answer these two questions

Answers

It’s better to have a low score and for the second one thumber I think....

a man 1.30 m tall is on a top of a building. he observed a car on the road at an angle of 60 degrees if the building is 30 m high,how far is the car from the building?​

Answers

Given :

A man 1.30 m tall is on a top of a building. He observed a car on the road at an angle of 60 degrees if the building is 30 m high.

To Find :

How far is the car from the building.

Solution :

Let, distance between car and the building is x m.

So,

[tex]tan \ \theta = \dfrac{height\ of\ building + height\ of\ man}{distance \ between \ car \ and \ building}\\\\tan \ 60^o = \dfrac{30+1.3}{x}\\\\x = \dfrac{31.3}{1.73}\ m\\\\x = 18.09\ m[/tex]

Hence, this is the required solution.

Freddy earned $7.95 an hour, and last week he worked for 20 hours. About how much money did he earn?

Answers

Answer:

He earned $159

Step-by-step explanation:

7.95 Times 20

Answer:

$159

Step-by-step explanation:

[tex]\frac{1}{20} :\frac{7.95}{y}[/tex]

Cross multiply.

y · 1 = 7.95 · 20

Simplify.

y = 159

PLEASE HELP!!

Write an equation for the
line on the graph below:

Answers

Answer:

x =-1 i think

Step-by-step explanation:

Answer:

x = -1

This is because all values of x is -1 no matter the y value

Feel free to mark this as brainliest :D

Which statement is NOT true about a rhombus?

A. It has four congruent sides.
B. It has two pairs of parallel sides.
C. It has four congruent angles.
D. It is a parallelogram.

Answers

Answer:

C. It has four congruent angles.

Step-by-step explanation:

Answer:   C) It has four congruent angles

=======================================================

Explanation:

A) This statement is true, so we can rule it out. A rhombus by definition has four sides the same length. Think of a square but the sides can be slanted or the angles could be something different from 90 degrees.

B) This statement is true. The opposite sides of a rhombus are always parallel. Any rhombus is always a parallelogram, but not the other way around.

C) False. This is the answer. We could have a square, and in which case we have four congruent angles. But we could slant the sides and have the angles be something else. All that matters is that all four sides are the same length.

D) True. Any rhombus is a parallelogram as mentioned in part B. However, some parallelograms are not a rhombus. Consider any rectangle in which the length and width are not the same. The sides are parallel, but we don't have all four sides the same length.

2. Caleb wants to tile the floor of his fort, the dimensions are 3mm by 4m. The tiles he
wants to buy come in squares. The perimeter of the tile is 80cm.
How many tiles will Caleb need?
tiles

Answers

Answer:

Number of tile need = 300 tiles

Step-by-step explanation:

Given:

Dimensions of floor = 3 m by 4 m

Perimeter of square tile = 80 cm

Find:

Number of tile need

Computation:

Perimeter of square tile = 4(Side)

80 = 4(Side of tile)

Side of tile = 80 / 4

Side of tile = 20 cm

Side of tile = 0.2 meter

Area of tile = 0.2 x 0.2

Area of tile = 0.04

Area of floor = 3 x 4

Side of tile = 12 square meter

Number of tile need = 12 / 0.04

Number of tile need = 300 tiles

Given f(x) = x + 5, find f(-1).

Answers

Answer:

☄ [tex] \large{ \tt{EXPLANATION}} : [/tex]

Here , We are provided : f ( x ) = x + 5 & we're asked to find out f ( - 1 ). Now , All you need to do is assuming the value of x as -1.

[tex] \large{ \tt{↬When \: x = - 1 ,\: f( - 1) = - 1 + 5 = \boxed{ \underline{ {4}}}}}[/tex]

[tex] \boxed{ \boxed{ \tt{OUR\: FINAL \: ANSWER : \boxed{ \bf{4}}}}}[/tex]

✺ Success can never be achieved by , " I'll do it tommorrow " kind of people !

ツ Hope I helped! ♡

☼ Have a wonderful day / evening ! ☃

# StayInAndExplore ! ☂

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An air-conditioning fan makes 125 revolutions per second. How many revolutions will it make if it runs for 30 minutes?

Answers

Answer:

225,000 revolutions

Step-by-step explanation:

An air conditioning fan makes 125 revolutions per second

The number of revolution in 30 minutes can be calculated as follows

60 secs= 1 min

x= 30 min

= 30×60

= 1800 secs

1800×125

= 225,000

Hence the airconditioning makes 225,000 revolutions in 30 minutes

MULTIPLE CHOICE QUESTION
What is the mean
11.65
11.85
11.45
11.25

Answers

11.45... to solve it, you add all of the numbers and then divide by the total number of numbers. so 126 divided by 11

If 1/4 inch on a scale drawing represents 5 miles , what’s does 1 inch represent

Answers

20 miles
...................
brainliest pls?
1/4 inch= 5 miles
1 inch = 5 x 4
= 20 miles
Therefore, 1 inch represents 20 miles

sidney writes two equations: I = 350n and E = 150n + 1000. The equations relate income I and operating expenses E to number of customers. Sidney writes the equation P = 350n − (150n + 1000) to show how tour profit P depends on the number of customers n. Use the rule to find profits P for 8, 12, 20, and 30 customers.

Answers

9514 1404 393

Answer:

  600, 1400, 3000, and 5000

Step-by-step explanation:

The profit equation can be simplified.

  P = 350n -(150n +1000)

  P = 200n -1000 . . . . . . . . . collect terms

  P = 200(n -5) . . . . . . . . . . . factor out 200

For the given numbers n, we have ...

  P = 200({8, 12, 20, 30} -5) = 200{3, 7, 15, 25} = {600, 1400, 3000, 5000}

Profits for 8, 12, 20, and 30 customers are 600, 1400, 3000, and 5000, respectively.

4(q-5) = 16
help pleaseee

Answers

Answer:

q = 9

Step-by-step explanation:

the key thing to understand in this problem is the distributive property. which basically means we can muliply what's on the interior of the parenthestes ( in this case q-5) by what's on the outside (4).

so 4 will distrubute to both the q and the -5

4q - 20 = 16

add 20 to both sides

4q = 36

divide both sides by 4

q = 9

RATIONALIZE THE
Denominator and
simplify

Answers

Answer:

[tex]\frac{8-\sqrt{6} }{2}[/tex]

Step-by-step explanation:

To rationalize the denominator, we need to multiply both the numerator and denominator by the conjugate of the denominator, which in this is 2 - √6.

We can write the expression:

[tex]\frac{3\sqrt{6}+5 }{2+\sqrt{6}} *\frac{2-\sqrt{6}}{2-\sqrt{6} }[/tex]

We can use the special product of the difference of squares to simplify the denominator:

[tex](2 + \sqrt{6})(2-\sqrt{6}) = 2^2 - (\sqrt{6})^2 =4 - 6 = -2[/tex]

We can use distributive for the numerator:

[tex](3\sqrt{6}+5)(2-\sqrt{6})=6\sqrt{6} -18+ 10-5\sqrt{6} =\sqrt{6} -8[/tex]

Now we can rewrite the fraction:

[tex]\frac{\sqrt{6}-8 }{-2} =\frac{8-\sqrt{6} }{2}[/tex]

This is urgent please help me out.The side lengths of different triangles are given. Which triangle is a right triangle?

Answers

Answer:

C. √18, √7, 5

Step-by-step explanation:

_____________

Which phrase is represented by the expression 6/r+5?
A.the sum of 6 and 5 divided by a number, r
B.five more than a number, r, divided by 6
C.six divided by the sum of a number, r, and 5
D.five more than the quotient of 6 and a number, r

Answers

Answer:

D.five more than the quotient of 6 and a number,

Step-by-step explanation:

To evaluate the the phrase written as :

6/r+5

Here, there is no bracket to make any distinction, hence using the BODMAS mode of evaluation, we deal with the division first before the sum. Hence we interpr te the equation as :

6 / r = quotient ; then, 5 is added to the quotient obtained from the divison of 6 by r.

Please help and I would really appreciate if the answer is correct

Answers

Answer:

The value for 6 is ones that's the answer

Answer:

14) 0.01 or 1/100

15) 0.06

16) 3.02

17) >

18)0.6

19) 100

20) 0.35

someone help asapp pls

Answers

The value of the probability P(A or B) is 0.77

How to evaluate the probability?

The given parameters are:

P(A) = 0.64

P(B) = 0.25

P(A and B) = 0.12

The probability is then calculated as

P(A or B) = P(A) + P(B) - P(A and B)

Substitute the known values in the above equation

P(A or B) = 0.64 + 0.25 - 0.12

Evaluate the like terms

P(A or B) = 0.77

Hence, the value of the probability P(A or B) is 0.77


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If a survey is selected at random, what is the probability that the student is a girl who chose apple as her favorite fruit

Answers

Answer:

0.15

Step-by-step explanation:

Total number of students surveyed = 300

From the table,

(Girl n apple) = 46

P(girl n apple) = 46 / 300 = 0.153

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