The following probability distributions of job satisfactionscores for a sample of information systems (IS) senior executivesand middle managers range from a low of 1 (very dissatisfied) to ahigh of 5 (very satisfied).
Job
Satisfaction
Score | Probability |
|---|
IS Senior
Executives | IS Middle
Managers |
|---|
| 1 | 0.05 | 0.04 |
| 2 | 0.09 | 0.10 |
| 3 | 0.04 | 0.12 |
| 4 | 0.42 | 0.46 |
| 5 | 0.40 | 0.28 |
(a)
What is the expected value of the job satisfaction score forsenior executives?
(b)
What is the expected value of the job satisfaction score formiddle managers?
(c)
Compute the variance of job satisfaction scores for executivesand middle managers.
executivesmiddle managers
(d)
Compute the standard deviation of job satisfaction scores forboth probability distributions. (Round your answers to two decimalplaces.)
executivesmiddle managers
(e)
Compare the overall job satisfaction of senior executives andmiddle managers.
The average score for senior executives is (lower than? higherthan? equal to?) the middle managers score. The standard deviationfor senior executives is (lower than, higher than, equal to) themiddle managers standard deviation.
