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. Waiting Time branch 1 Waiting Time Branch 2
4.21 9.66
5.55 5.9
3.02 8.02
5.13 5.79
4.77 8.73
2.34 3.82
3.54 8.01
3.2 8.35
4.5 10.49
6.1 6.68
0.38 5.64
5.12 4.08
6.46 6.17
6.19 9.91
3.79 5.47

Required:
a. Set up the null and alternative hypotheses.
b. Are the samples for this analysis "independent samples" or "related samples"? Explain briefly.