Estimate the hdl cholesterol

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A doctor wants to estimate 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 o=17.2? Suppose the doctor would be content with 90% confidence.

(a) A 99% confidence level requires how many subjects?

(b) A 90% confidence level requires how many subjects?

(c) How does the decrease in confidence affect the sample size required?

(a) The lower the confidence level the smaller the sample size.

(b) The lower the confidence level the larger the sample size.

(c) The sample size is the same for all levels of confidence.

Reference no: EM132155597

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