FINAL EXAM MATH 526 SUMMER 2023
Question 7:(15 points) A company institutes an exercise break for its workers to
see if it will improve job satisfaction, as measured by a questionnaire that assesses
workers' satisfaction. Scores for 10 randomly selected workers before and after the
implementation of the exercise program are shown as below:
Worker Number Before Exercises After Exercises
33
36
50
41
37
41
39
21
1
2
3
4
7
9
10
34
28
29
45
26
27
24
15
15
27
20
37
Assuming the populations to be normally distributed, is there sufficient evidence,
at the 0.05 level of significance, to say that the mean job satisfaction rating has
increased since the implementation of the exercise program? Then find a 95%
confidence interval for the mean satisfaction rating difference to see whether it
supports the conclusion in the hypothesis test.
Fig: 1