To estimate the average annual expenses of students onbooks and class materials a sample of size 36 is taken. The mean is$850 and the standard deviation is $54. A 99% confidence intervalfor the population mean is; To estimate the average annual expenses of students onbooks and class materials a sample of size 36 is taken. The mean is$850 and the standard deviation is $54. A 99% confidence intervalfor the population mean is
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