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 with 99% confidence assuming s = 13.2 based on earlier studies? Suppose the doctor would be content with 95% confidence. How does the decrease in nce affect the sample size required? ck the icon to view a partial table of critical values. AZXE confidence level requires subjects. (Round up to the nearest subject.)

Q: What is the correct answer ? I have to show work.

A: Given Information: Sample size (n) = 22  Mean (u) = 12 Standard deviation (s) = 5.4

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