The following probability distributions of job satisfaction scores for a sample of information systems (IS) senior executives and middle managers range from a low of 1 (very dissatisfied) to a high of 5 (very satisfied).
Probability
Job Satisfaction IS Senior IS Middle
Score Executives Managers
1 0.05 0.04
2 0.09 0.10
3 0.03 0.12
4 0.42 0.46
5 0.41 0.28
a. What is the expected value of the job satisfaction score for senior executives (to 2 decimals
b. What is the expected value of the job satisfaction score for middle managers (to 2 decimals)?
c. Compute the variance of job satisfaction scores for executives and middle managers (to 2 decimals).
Executives
Middle managers
d. Compute the standard deviation of job satisfaction scores for both probability distributions (to 2 decimals).
Executives
Middle managers
