The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 28 people reveals the mean yearly consumption to be 65 gallons with a standard deviation of 20 gallons. Assume the population distribution is normal. (Use t Distribution Table.)
a-1. What is the value of the population mean?
Unknown
65
20
a-2. What is the best estimate of this value?
b. For a 99% confidence interval, what is the value of t? (Round your answer to 3 decimal places.)
c. What is the margin of error? (Round your answer to 3 decimal places.)
d. Develop the 99% confidence interval for the population mean. (Round your answers to 3 decimal places.)
