Suppose the doctor would be content with 95 confidence how


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 sigma = 14.8? Suppose the doctor would be content with 95 % confidence. How does the decrease in confidence affect the sample size? required? A? 99% confidence level requires __ subjects.

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