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Confidence affect the sample size? required

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Problem: 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 3 points with 99 % confidence assuming s=15.2 based on earlier? studies? Suppose the doctor would be content with 90 % confidence.

Does the decrease in confidence affect the sample size? required?

A? 99% confidence level requires?

A 90% confidence level requires?

Reference no: EM132479356

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