A doctor wants to estimate the mean hdl cholestrol of all

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A doctor wants to estimate the mean HDL cholestrol of all 20 to 29 year old females. How many subjects are needed to estimate the HDL cholestrol within 3 points with 99% confidence assuming s=18.9 on an earlier studies. suppose the doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required?

Reference no: EM13639106

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