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A random sample of 250 students at a university finds that these students take a mean of 15.6 credit hours per quarter with a standard

A random sample of 250 students at a university finds that these students take a mean of 15.6 credit hours per quarter with a standard deviation of 1.5 credit hours. Estimate the mean credit hours taken by a student each quarter using a 99% confidence interval.

A.

15.60.199

B.

15.60.244

C.

15.60.015

D.

15.60.0

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