1. Abank is experimenting with processes to improve customer service during peak periods of business (for example, during the lunch hour}. Two alternative processes were implemented at two different bank branches. A random sample of 15 customers was chosen at each bank, and their waiting times were recorded. These data, and the Excel output, can be found on the excel file Bank_waiting_time.xls. Note: ignore the sample size issue. a. Set up the null and alternative hypotheses. b. Using Excel output, is there evidence that the mean waiting time for the two branches are not equal? Interpret the sample t-value and the two tailed p-value for the test