Answered: Last year a company received 50…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Last year a company received 50 complaints concerning carpet installation. The data in the accompanying table represents the number of days between the receipt of a complaint and the resolution of the complaint.

The supervisor claims that the mean number of days between the receipt of a complaint and the resolution of the complaint is 30 days. At the 0.01 level of significance, is there evidence that the claim is not true (that is, that the mean number of days is different from 30)?

a. State the null and alternative hypotheses.

b. Determine the test statistic.

c. Find the p-value.

d.State the conclusion.

Days between receipt and resolution of complaint
47
54
35
132
38
27
153
128
82
79
24
20
20
116
104
112
19
95
87
37
27
22
1
11
160
30
31
21
23
27
6
11
10
19
10
11
20
22
54
35
25
32
22
20
22
33
68

Expert Solution

Step 1

47
82
87
21
22
54
79
37
23
54
8
24
27
27
35
35
20
22
6
25
132
20
1
11
32
38
116
11
10
22
27
104
2
19
20
153
112
160
10
22
3
19
30
11
128
95
31
20
68
33
43.9	Mean
41.4105	Stdev

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