A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 4 points with 99% confidence assuming s=15.1 based on earlier​ studies? Suppose the doctor would be content with 90% confidence.        Question content area bottom Part 1 A​ 99% confidence level requires    ​(Round up to the nearest​ subject.) Part 2 A 90% confidence level requires    ​(Round up to the nearest​ subject.) Part 3 How does the decrease in confidence affect the sample size​ required?

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within
4
points with
99%
confidence assuming
s=15.1
based on earlier​ studies? Suppose the doctor would be content with
90%
confidence. 
 
 
 

Question content area bottom

Part 1
A​ 99% confidence level requires
 
 ​(Round up to the nearest​ subject.)
Part 2
A
90%
confidence level requires
 
 ​(Round up to the nearest​ subject.)
Part 3
How does the decrease in confidence affect the sample size​ required?
 
 
A.
Decreasing the confidence level increases the sample size needed.
 
B.
Decreasing the confidence level decreases the sample size needed.
 
C.
The sample size is the same for all levels of confidence.
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