The following probability distributions of job satisfaction scores for a sample of information systems (IS) senior…
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).
Job Satisfaction Score 
Probability  

IS Senior Executives 
IS Middle Managers 

1  0.05  0.04 
2  0.09  0.10 
3  0.03  0.13 
4  0.42  0.45 
5  0.41  0.28 
(a)
What is the expected value of the job satisfaction score for
senior executives?
(b)
What is the expected value of the job satisfaction score for
middle managers?
(c)
Compute the variance of job satisfaction scores for executives
and middle managers.
executivesmiddle managers
(d)
Compute the standard deviation of job satisfaction scores for
both probability distributions. (Round your answers to two decimal
places.)
executivesmiddle managers
(e)
Compare the overall job satisfaction of senior executives and
middle managers.
The average score for senior executives
is —Select— lower than higher than equal to the
middle managers score. The standard deviation for senior executives
is —Select— lower than higher than equal to the
middle managers standard deviation.