The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 13 people reveals the mean yearly consumption to be 58 gallons with a standard deviation of 18 gallons.
(a-1) What is the value of the population mean?
(a-2) What is the best estimate of this value? c) For a 90% confidence interval, what is the value of t? (d) Develop the 90% confidence interval for the population mean.