A bank 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. Note: ignore the sample size issue.

WO Waiting Time Waiting Time branch 1 Branch 2 Mean 4 286666667 7 114666567 Variance 2 682995238 4 335512381 Observations 15 Pooled Variance 3 50925381 Wypothesized Mean Difference 28 i. Stat 13430627 7 (15 0) ong ia 0 00014642 i Critical ong lal 1 701 130934 0 000292839 i Critical two tal 204840/142