A doctor who wants to estimate the HDL cholesterol of all 20-29 year old females. How many subjects are needed to estimate the HDL choelsterol within 2 points with 99% confidence assuming o=16.1? Suppose the doctor would be content with 95% condifence. how does that decrease in confidence affect the sample size required?
A) A 99% confidence level requires ___ subjects.
B) A 95% confidence level requires ___ subjects.