A customer satisfaction study is conducted for the two leading home improvement stores: Home Pro and Index Mart. A group of people chosen randomly is asked to rate Home Pro's products and services on a scale of 0 to 100 (100 is best). Another group of people chosen randomly is asked to rate Index Mart on the same scale. Data set is provided in the Excel Template file. Can it be concluded that the average customer satisfaction scores are different?

HomePro	IndexMart
90	86
89	87
91	89
81	80
75	80
95	87
87	95
87	85
89	87
82	87
84	94
80	86
87	90
86	85
84	84
87	83
70	84
80	85
88	82
86	94
83	86
85	94
80	87
87	91
86	89

Part A: What is the appropriate tool for this analysis and why? Be as specific as possible. Part B: Specify the null and alternative hypotheses. Part C: What is the conclusion at 5% significance level? Why? Also provide a complete interpretation of the result (i.e., what the result means in the context of the problem). Part D: Based on the same data, can you conclude that the average customer satisfaction score of Home Pro is higher than that of Index Mart (5% significance level)? Why?