A large corporation is interested in determining whether an association exists between the commuting time of its employees and the level of stress-related problems observed on the job. A study of 116 assembly-line workers reveals the following:
|
Stress
|
|
|
|
Commuting Time
|
High
|
Moderate
|
Low
|
Total
|
|
Under 15 min
|
9
|
5
|
18
|
32
|
|
15 - 45 min
|
17
|
8
|
28
|
53
|
|
Over 45 min
|
18
|
6
|
7
|
31
|
|
Total
|
44
|
19
|
53
|
116
|
(a) At the 0.01 level of significance, is there evidence of a significant relationship between commuting time and stress?