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To estimate the average annual expenses of students on books and class materials a sample of size 36 is taken. The mean is $850 and

To estimate the average annual expenses of students on books and class materials a

sample of size 36 is taken. The mean is $850 and the standard deviation is $54. A 99%

confidence interval for the population mean is

A. $823.72 to $876.28

B. $832.36 to $867.64

C. $826.82 to $873.18

D. $825.49 to $874.51

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