Question: Zip, Inc. manufactures Zip drives on two different manufacturing processes. Because the management of this company is interested in determining if process 1 takes less manufacturing time, they selected independent samples from each process. The results of the samples are shown below. Historical data shows that the variance of these two processes can be assumed to be equal.

a) What test should the management conduct? State the null and alternative hypotheses.

b) Compute the test statistic

c) At 95% confidence, test to determine if there is sufficient evidence to indicate that process 1 takes a significantly shorter time to manufacture the Zip drives.