You can use the order of operations! So we start with 99^3/9. That is 99^2*11. So now let’s do 99/99, it’s 1. So 99^2*11 is 107811, so the answer is 107810.

8 0

4 years ago

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Suppose a 95% confidence interval, based upon a sample of size 25, for the mean number of hours of sleep that college students g

Anastaziya [24]

Answer:

100 students should be surveyed in order to cut the width of the interval down from 3 hours to 1.5 hours

Step-by-step explanation:

Given that a 95% confidence interval, based upon a sample of size 25, for the mean number of hours of sleep that college students get per night was 5 to 8 hours.

Confidence interval = (5,8)

This implies that mean = 6.5 and margin of error = 1.5

i.e. $1.5 =1.96*\frac{s}{\sqrt{25} }$

If the interval width to be cut into half then the

New confidence interval = (5.75, 7.25)

Margin of error = 0.75

$0.75=1.96*\frac{s}{\sqrt{n} }$

This is possible only when new n= 100

Hence sample size should be increased to 100

100 students should be surveyed in order to cut the width of the interval down from 3 hours to 1.5 hours

4 0

3 years ago

What is 4 divided by 610

grandymaker [24]

Answer:

4/610=0.00655737704918

Step-by-step explanation:

4 0

3 years ago

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