Monash University has put in place a 4 week course of lunchtime exercise breaks for its staff to see if its employees' job satisfaction can be improved. To measure the effectiveness of this program, 10 randomly selected staff who entered the program were surveyed about their feelings at work, once at the start of the program and again after the course. Higher scores indicate higher satisfaction.
The job satisfaction index results for this group were:
Microsoft Word-ASSIGNMENT
|
Staff
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
|
Before
|
34
|
28
|
29
|
45
|
26
|
27
|
24
|
15
|
15
|
27
|
|
After
|
33
|
31
|
36
|
46
|
32
|
34
|
28
|
26
|
19
|
37
|
1. Compute a 98% confidence interval for the mean change in job satisfaction. Include all necessary conditions check and show all your working.
2. Based on this confidence interval, is there sufficient evidence to conclude that the job satisfaction is improved by this program?