Question

A dairy manager would like to estimate the mean number of one

gallon milk sold. Assuming that the gallons of milk sold follows the normal distribution with a population standard deviation of 3.01. The manager selects a random sample of 75 sales and finds the mean number of one gallon milk sold is 7.85.

a.      What is the estimate of the population mean? 

b.      What is the population mean with 99% confidence interval?

c.      What does your result in part (b) say about the population mean?

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