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[answered] A doctor wants to estimate the HDL cholesterol of all 20- t


How many subjects requied at 99% and 95% confidence level and how does the decrease in confidence level affect the sample size


A doctor wants to estimate the HDL cholesterol of all 20- to 29-year-old females. How many subjects are

 

needed to estimate the HDL cholesterol within 4 points with 99% confidence assuming deviation equals

 

14.3 Suppose the doctor would be content with 95 %95% confidence. How does the decrease in

 

confidence affect the sample size required?

 

A 99% confidence level requires how many subject? Round up to nearest whole number

 

At 95% confidence level requires how many subject? Round up

 

How does the decrease in confidence affect the sample size required?

 

A.

 

The lower the confidence level the larger the sample size.

 

B.

 

The lower the confidence level the smaller the sample size.

 

C.

 

The sample size is the same for all levels of confidence

 


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