SOLUTION: It is determined that the 100 subjects have a sample mean serum cholesterol level of 217 and the sample standard deviation is 39. If the desirable serum cholesterol level is set at

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Question 630712: It is determined that the 100 subjects have a sample mean serum cholesterol level of 217 and the sample standard deviation is 39. If the desirable serum cholesterol level is set at 200, would you have concerns about elevated serum cholesterol level in this sample? Use a = .05
Answer by stanbon(75887) About Me  (Show Source):
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It is determined that the 100 subjects have a sample mean serum cholesterol level of 217 and the sample standard deviation is 39. If the desirable serum cholesterol level is set at 200, would you have concerns about elevated serum cholesterol level in this sample? Use a = .05
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z(217) = (217-200)/(39/sqrt(100)) = 4.36
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The mean of that sample is 4.36 standard deviations
above the mean of the sample means.
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Be concerned.
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Cheers,
Stan H.