One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major expansion in the past several years. In particular, the flooring department had expanded from two installation crews to an installation supervisor, measures, and 15 installation crews. A sample of 50 complaints concerning carpet installation was selected during recent year. The data in the file furniture.xls represent the number of days between the receipt of a complaint and the resolution of the complaint:
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54
|
5
|
35
|
137
|
31
|
27
|
152
|
2
|
123
|
81
|
74
|
27
|
|
11
|
19
|
126
|
110
|
110
|
29
|
61
|
35
|
94
|
31
|
26
|
5
|
|
12
|
4
|
165
|
32
|
29
|
28
|
29
|
26
|
25
|
1
|
14
|
13
|
|
13
|
10
|
5
|
27
|
4
|
52
|
30
|
22
|
36
|
26
|
20
|
23
|
|
33
|
68
|
|
|
|
|
|
|
|
|
|
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Calculate the range, interquartile range, variance, standard deviation, and coefficient of variation.