SOLUTION: A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 81.26% confidence interval. The blood cholesterol level of young men follows a Normal
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Question 1197914: A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 81.26% confidence interval. The blood cholesterol level of young men follows a Normal distribution with standard deviation = 30 mg/dl. How large a sample would the researcher need to take to estimate the mean blood cholesterol to within 9 mg/dl?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
0r
81.26% confidence interval = 9.7% z(.8126 + .097) = 1.34
= 19.98 (always round Up )
n = 20
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