A doctor wants to estimate the HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the HDL cholesterol within 2 points with 90% confidence assuming sigma = 15.6? Suppose the doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required?
A 99% confidence level requires __ subjects.
A 95% confidence level requires __ subjects.
Sample Size for 90% CI, E = 2 and ? = 15.6
Confidence level = 90% and Desired Margin of Error, E = 2.
Minimum sample size is given by:
x ? µ| < E) ? 1 ? ? ? P ( ?...
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Sep 21, 2019EXPERT
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