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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 the standard deviation is $54. A 99% confidence interval for the population mean is?

$823.72 to $876.28
$832.36 to $867.64
$826.82 to $873.18
$825.48 to $874.52

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Category:- Statistics and Probability
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