a.) What is the value of the population mean? What is the best estimate of this value?
b.) Explain why we need to use the t distribution. What assumption do you need to make?
c.) For a 90 percent confidence interval, what is the value of t?
d.) Develop the 90 percent confidence interval for the population mean.
e.) Would it be reasonable to conclude that the population mean is 63 gallons?
This solution is comprised of detailed explanation and step-by-step calculation of the given problem and provides students with a clear perspective of the underlying concepts.