A teacher would like to estimate the mean number of steps students take during the school day. To do so, she selects a random sample of 50 students and gives each one a pedometer at the beginning of the school day. They wear the pedometers all day and then return them to her at the end of the school day. From this, she computes the 98% confidence interval for the true mean number of steps students take during the school day to be 8,500 to 10,200. If the teacher had used a 90% confidence interval rather than a 98% confidence interval, what would happen to the width of the interval

Answers

Answer 1

Answer:

The answer is "It would decrease, but not necessarily by 8%".

Step-by-step explanation:

They know that width of the confidence level is proportional to a confidence level. As just a result, reducing the confidence level decreases the width of a normal distribution, but not with the amount of variance in the confidence level. As just a result, when a person teaches a 90% standard deviation rather than a 98 percent normal distribution, the width of the duration narrows.


Related Questions

The length of a rectangular prism is four times the width. The height of the prism is 160ft^3, what is the width of the prism? Round the the nearest tenth of a foot​

Answers

Answer:

The width of the prisim is equal to 2.23 feet.

Step-by-step explanation:

let l is length and b is width.

Length, l = 4b

The volume of the prism is 160 ft³.

The height of the prism is 8 ft.

The formula for the volume of a prism is given by :

[tex]V=lbh\\\\160=4b\times b\times 8\\\\160=32b^2\\\\b^2=\dfrac{160}{32}\\\\b=\sqrt5\\\\b=2.23\ ft[/tex]

So, the width of the prisim is equal to 2.23 feet.

A data set is made up of these values.
8, 10, 11, 13, 14, 16, 17
Find the interquartile range,
O A. 17 - 13 = 4
B. 10 - 8 = 2
O C. 16 - 10 = 6
D. 17 - 8 = 9

Answers

Answer:

C

Step-by-step explanation:

I took the test on A p e x

Hope this helps!

Larry hos
a $100 gift card to spend at a toy store.
He spends the same amount
every month on toys
When will be hove So left?
Explain how you know

Answers

Answer:

Well it can be multiple choices, but I say people are most likely to spend 25 dollars. So it will take him 4 months to have $0

Step-by-step explanation:

Ari writes down two numbers. The total is 37. The difference between them is 14.
What are the numbers?

Answers

Answer:

11.5 & 25.5

Please mark as brainliest if answer is right

Have a great day, be safe and healthy  

Thank u  

XD  

what is a decimal that is equivalent to the fraction 45/100?

Answers

Answer:

0.45

Step-by-step explanation:

Step-by-step explanation

Answer:

0.45.

Step-by-step explanation:

Dividing 45 by 100 gives us 0.45.

Please please help me please

Answers

Answer:

If the percentage is 20%, the down payment is $177,100

If the percentage is 10%, the down payment is $88,550

Step-by-step explanation:

This is a terrible question, in my opinion, unless they gave more information at the top of the page. A down payment on a house can be anywhere from 3.5% to 20%

Let's go with the 20%

885,500 x 0.20 = 177,100

A landscaper waters a lawn during the summer.
He wants to know how much water is being used
per minute. He records the amount of water used
in the table.
PLEASE NO LINK.

Answers

Answer:

Step-by-step explanation:

D bc yes

Im confused in the wording on this question can someone tell me how to solve it with clear steps

Answers

Answer:

G

Step-by-step explanation:

Answer:

G: The printer prints 3 fewer pages per minute in colored ink than in black ink.

Step-by-step explanation:

The answer is G because the relation between the two different print jobs can be seen in the "33t" and "30t" values. The relation is showing that when the printer prints in black, it prints 3 more pages per minute.

I don’t need any help with homework but i would like to thank you all for helping me survive this school year. Brainly has helped me sm <3 (posting this on mathematics bc that’s what i needed/got help most on)

Answers

Answer: Of course, your so welcome :)

Step-by-step explanation:

Yes of course this school was hard but hey we got trough it right. I even have been using this.Every student in my school is right now.

What is exactly between 2 and 3 on a number line?
A. 1.5
B. 3.5
C. 2.5

Answers

Answer:

2.5 my guy

Step-by-step explanation:

C. 2.5
bcs if you have a line btwn 2 and 3, 2 and a half would be right in btwn it

Which shows the list of numbers in order from least to greatest?

StartAbsoluteValue negative 4.2 EndAbsoluteValue, StartAbsoluteValue negative four-fifths EndAbsoluteValue, StartAbsoluteValue negative 1 EndAbsoluteValue, –2, StartAbsoluteValue 3.5 EndAbsoluteValue
–2, StartAbsoluteValue negative four-fifths EndAbsoluteValue, StartAbsoluteValue negative 1 EndAbsoluteValue, StartAbsoluteValue 3.5 EndAbsoluteValue, StartAbsoluteValue negative 4.2 EndAbsoluteValue
–2, StartAbsoluteValue negative 1 EndAbsoluteValue, StartAbsoluteValue 3.5 EndAbsoluteValue, StartAbsoluteValue negative 4.2 EndAbsoluteValue, StartAbsoluteValue negative four-fifths EndAbsoluteValue
–2, StartAbsoluteValue negative four-fifths EndAbsoluteValue, StartAbsoluteValue negative 1 EndAbsoluteValue, StartAbsoluteValue negative 4.2 EndAbsoluteValue, StartAbsoluteValue 3.5 EndAbsoluteValue
StartAbsoluteValue 3.5 EndAbsoluteValue, StartAbsoluteValue negative four-fifths EndAbsoluteValue, StartAbsoluteValue negative 1 EndAbsoluteValue, –2, StartAbsoluteValue negative 4.2 EndAbsoluteValue

Answers

Answer:

Absolute value

Step-by-step explanation:

Answer:

Absolute value

A

Step-by-step explanation:

I got it right on edg

Your baby brother has an ear infection. The doctor said there are probably 50,000 bacteria in his left ear. The penicillin the doctor prescribed will kill 7% of the bacteria every hour. About how long will it take for there to be less than 25,000 bacteria?​

Answers

Answer:

Ok I'm not sure but (9 hours)

Step-by-step explanation:

50,000 divided by 25,000 = 7

7 plus 2 equals 9.

(Sorry, I forgot to post the graph on the last one) The table below shows the water temperature at certain depths of a lake. Using an logarithmic model, write an equation for the curve of best fit, then estimate the depth of water at a temperature of 50 degrees F.

Answers

Answer:

B

Step-by-step explanation:

Mrk me BRAINLIEST PLZZZZZZZZ

Please help me what is it

Answers

Answer:

13/14

Step-by-step explanation:

3/7 x 2/2 = 6/14

1/2 x 7/7 = 7/14

6/14 + 7/14 = 13/14

Answer:

1/14

Step-by-step explanation:

Which pair of equations below is a result of constructing the altitude, h, in traingle ABC?

Answers

Answer:

sinA = h/c; sinC = h/a

Step-by-step explanation:

Which pair of equations below is a result of constructing the altitude, h, in Triangle ABC?

sinA= h/c

sinC= h/a

sinA= h/c

sinB= b/c

sinA= b/c

sinC= b/a

Solution:

A triangle is a polygon with three sides and three angles. There are different types of triangles such as right angled, acute, obtuse and isosceles triangle.

In right angle triangle, one angle is 90°. From Pythagoras theorem, the square of the longest side (hypotenuse) is equal to the sum of the square of the two sides.

In right triangle, trigonometric identities are used to show the relationship between the sides of a triangle and the angles.

sinθ = opposite / hypotenuse, cosθ = adjacent / hypotenuse, tanθ = opposite / adjacent

Therefore in triangle ABC:

sinA = h/c;  sinC = h/a

Answer:

A

Step-by-step explanation:

Pls answer fast pls pls test

Answers

Step-by-step explanation:

2a)3+x/4=5

or,12+x/4=5

or,12+x=20

or,x=20-12

therefore,x=8

Give the following sequence for f(x) = 4x^2 - x , when x is -4, 1, 2
A. 68, 14, 3
B. 7, 14, 3
C. - 64, - 14, 3
D. 58, 14, 3

Answers

Answer:

A

Step-by-step explanation:

by putting the value of x

ans was A

Matilda is practicing her marching band skills on the football field. she starts in the center if the field walks 80 feet south then 60 feet west how far is she from the center of the field where she started

Answers

Answer:

100 feet

Step-by-step explanation:

pythagorean theorm

60^2+80^2= 10,000

Square root of 10,000= 100

need help ace plsssz​

Answers

Answer:

150 multiply the 2 numbers

hope this helps

have a good day :)

Step-by-step explanation:

AGAIN PLZZZZZZ HELPP MEEEEEEEEE

Answers

Answer:

Hi, there your answer is

Question5: B.(x+3)(x-10)

Queston 6: D.(2x-2)(x+3)

Step-by-step explanation:

Can somebody help me out with my homework my grades are bad

Answers

Answer:

Ok I can help you out.

What is the homework?

Step-by-step explanation:

Hope I can help! :)

Yes, what is the question?

what is 3 1/3 divided by 2

Answers

Answer:

1 and 2/3

Step-by-step explanation:

1+1=2 and 2/3 +2/3 = 4/3 so all is 3 and 1/3

Answer:

1 2/3 or 5/3

Step-by-step explanation:

3 1/3=10/3 (10/3)/(2/1)=(10/3)/(1/2)=10/6=5/3 Improper:5/3 Mixed:1/23

if the length is 18 inches and the width is 24 inches what's the area

Answers

Answer:

L x W = 432

Step-by-step explanation:

18 X 24 = 432

1. Please help !!! Provide work if possible !

Answers

Answer:

73

Step-by-step explanation:

-(23/47)

Which of the following is equivalent to the given number?
ASAP

Answers

Given:

The number is:

[tex]-(\dfrac{23}{47})[/tex]

To find:

The number that is equivalent to the given number.

Solution:

In option A,

[tex]-(-\dfrac{23}{47})=\dfrac{23}{47}[/tex]            [tex][\because (-)(-)=(+)][/tex]

In option B,

[tex]\dfrac{23}{-47}=-\dfrac{23}{47}[/tex]

In option C,

[tex]\dfrac{-23}{-47}=\dfrac{23}{47}[/tex]

In option D, we have

[tex]\dfrac{23}{47}[/tex]

The numbers in options A, C and D are equivalent to [tex]\dfrac{23}{47}[/tex]. So, options A, C and D are incorrect.

The numbers in options B is equivalent to [tex]-(\dfrac{23}{47})[/tex]. So, option B is correct.

Therefore, the correct option is B.

Find the center and radius of this
circle.
(x - 2)2+(y + 3)2 = 36

Answers

Answer:

(x-a)² + (y-b)² = r²

C(a,b) -> C ( 2 , -3 )

r² = 36 ... r = 6

Answer:

The answer is 2 then -3 and last 6

Step-by-step explanation:

Put in 2 then -3 and last 6 You welcome

Ava borrows $600 to buy a bike at a yearly simple interest
rate of 2.25%. Ava borrows the money for 3 years. How much does Ava
pay in all?

Answers

Answer:

Ava has to pay in all $640.50

Step-by-step explanation:

.0225×600×3= $40.50

600+40.50=640.50

Hope this helps!

Please help me with my work and I’ll give brainlessly

Answers

Answer:

Step-by-step explanation:

volume=15×5×5+8×4×5+8×4×5

=375+160+160

=695 m³

Answer:

695 m^3

Step-by-step explanation:

With this object, there are three rectangular prisms. The equation to find the volume of them is L*W*H.

So, with the small one in the front, the sides are 8, 4, and 5, so do:

8*4*5 ---> 160

Next, with long middle one, the sides are 5, 5, and 15, so do:

5*5*15 --->375

Then, with small one in the back, 8, 4, and 5 again, so do:

8*4*5 ---> 160

To finish it off, add them all together.

160 + 375 + 160 = 695 m^3

a parallelogram is transformed according to the rule (x , y)

Answers

Answer:

hi how are you doing today Jasmine

what is the question?


please let me know and I’ll help ASAP!

An artist receives royalties for all digital downloads of his music. For the first 10,000 downloads, the artist receives $10,000. He receives $12,500 for the next 10,000 downloads, $15,000 for the next 10,000 downloads and so on. How much money will he receive if his music is downloaded 500,000 times?

Answers

Answer:

Step-by-step explanation:

This is a linear relationship. We know this because as the number of songs increases by 10,000 the amount of money increases $2500. We can use that relationship in a proportion, which is a method used to solve problems involving directly proportional numbers.

If we arrange our information such that the dollars earned are on the top of the fraction and the number of songs that need to be downloaded to earn that amount of money is on the bottom of the fraction, here is what we have:

[tex]\frac{2500}{10,000}[/tex]. This means that the artist receives $2500 for every 10,000 downloads. Keeping in that pattern, we can find out how much money he will earn when 500,000 downloads are completed, assuming that the amount he earns per 10,000 songs doesn't change.

[tex]\frac{2500}{10000}=\frac{x}{500000}[/tex] and cross multiply to get

10,000x = 1250000000 and divide to get

x = 125,000

That is the amount that he will earn from 500,000 downloads.

[tex]\frac{$}{#}[/tex]

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