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A doctor wants to estimate the HDL cholesterol of all 20— to 29—year—old females. Howr many subjects are needed to estimate the HDL cholesterol within 3 points
with 99% confidence assuming 0 =1?.9? Suppose the doctor would be content with 95% confidence. Howr does the decrease in confidence afiect the sample
size required? A 99% confidence level requires |:| 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 confidence afiect the sample size required?
0 A. The lower the confidence level the smaller the sample size. 0 B. The sample size is the same for all levels of confidence.
0 C. The lower the confidence level the larger the sample size.

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