SOLUTION: A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 96.66% confidence interval. The blood cholesterol level of young men follows a Normal

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Question 1197913: A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 96.66% confidence interval. The blood cholesterol level of young men follows a Normal distribution with standard deviation = 50 mg/dl. How large a sample would the researcher need to take to estimate the mean blood cholesterol to within 5 mg/dl?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
ME+=+z%2Asigma%2Fsqrt%28n%29
0r
n+=+%28z%2Asigma%2FME%29%5E2
96.66% confidence interval %28100-99.66%29%2F2= .17% z(.9966 + .0017) = 2.929

n+=%282.929%2A50%2F5%29%5E2 = 857.9 (always round Up )
n = 858