To estimate the average annual expenses of students on books and class materials, a sample of size 36 is taken. The sample mean is $850 and the sample standard deviation is $54. A 99 percent 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)$825.48 to $874.52

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The Answer of To estimate the average annual expenses of students on books and class materials, a sample of size 36 is taken. The sample mean is $850 and the sample standard deviation is $54. A 99 percent 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)$825.48 to $874.52

To Estimate the Average Annual Expenses of Students on Books