Commercial4.155.593.015.474.612.523.623.024.746.060.355.046.656.283.71Residential9.855.938.095.918.543.598.038.6210.546.725.394.186.469.875.45 A bank with branches located in a commercial district of a city and in a residential area has the business objective of developing an 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 are collected from a random sample of 15 customers at each branch. Complete parts (a) through (d) below. Click the icon to view the bank branch data. C. It Is the probablity or obtanng a sampe tnat yieas a t-test statstc tartner away trom U in eitner arecton than the computed test statistic if there is no difference in the mean waiting time between commercial and residential banks. D. It is the probability of obtaining a sample that yields a t-test statistic farther away from 0 in the negative direction than the computed test statistic if there is no difference in the mean waiting time between commercial and residential banks. c. In addition to equal variances, what other assumption is necessary in (a)? A. Both sampled populations are not approximately normal. B. Both sampled populations are approximately normal. C. The samples are specifically chosen and not independently sampled. D. The sample sizes must be equal. d. Construct and interpret a 99% confidence interval estimate of the difference between the population means between the two branches. The 99% confidence interval is 12 (Round to three decimal places as needed.)