A bank with a branch located in a commercial district of a city has the business objective of improving the process for serv-ing customers during the noon-to-1 p.m. lunch period. To do so, the waiting time (defined as the number of minutes that elapses from when the customer enters the line until he or she reaches the teller window) needs to be shortened to increase customer sat-isfaction. A random sample of 15 customers is selected and the waiting times are collected and stored in Bank1 . These data are:4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.204.50 6.10 0.38 5.12 6.46 6.19 3.79Suppose that another branch, located in a residential area, is also concerned with the noon-to-1 p.m. lunch period. A random sample of 15 customers is selected and the waiting times are collected and stored in Bank2 . These data are: 9.66 5.90 8.02 5.79 8.73 3.82 8.01 8.3510.49 6.68 5.64 4.08 6.17 9.91 5.47
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