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

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