A doctor wants to estimate the HDL cholesterol of 20 to 29 year old females How

Question

A doctor wants to estimate the HDL cholesterol of 20 to 29 year old females How many subjects are be content with 95% confidence. How does the decrease in confidence affect in the sample size is required A 99% confidence level subjects. (Round up to the nearest whole number as needed) A 95% confidence level requires subjects round up to the nearest whole number as needed How does the decrease in a confidence affect the sample size required The sample size is the same for all levels of confidence The lower the confidence level the smaller size The lower the confidence level the larger the Sample size

Explanation / Answer

The required sample size to ensure 95% confidence is:

(z(0.95)*sigma/E)^2

=(1.96*18.7/2)^2

=335.84

=336

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