Problem 1. (20 points, 5 parts points) A bank with a branch located in a commercial district of a city has the business objective of developing in improved process for serving customers during the noon-to-1 p.m. lunch period. Management decides to first study the waiting time in the current process. The waiting time is defined as the number of minutes that elapses from when the customer enters the line until he or she reaches the teller window. Data collected from a random sample of 15 customers are stored in "Bank.xlex" in the worksheet entitled "Bank1". Suppose that another branch, located in a residential area, is also concerned with improving the process of serving customers in the noon-to-1 p.m. lunch period. Data collected from a random sample of 15 (different) customers are stored in worksheet "Bank2". Do not assume that the population variances of both banks are equal, and do not use Minitab for your analysis