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a. What is the expected value of the job satisfaction score for senior executives (to 2 decimals)? 4.05 b. What is the expected value of the job satisfaction score for middle managers (to 2 decimals)? 3.84 c. Compute the variance of job satisfaction scores for executives and middle managers (to 2 decimals). Executives 1.79 Middle managers 1.14 d. Compute the standard deviation of job satisfaction scores for both probability distributions (to 2 decimals). Executives 1.34 Middle managers 1.07 e. What comparison can you make about the job satisfaction of senior executives and middle managers? Senior executives have higher satisfaction with more variation

a. What is the expected value of the job satisfaction score for senior executives (to 2 decimals)? 4.05 b. What is the expected value of the job satisfaction score for middle managers (to 2 decimals)? 3.84 c. Compute the variance of job satisfaction scores for executives and middle managers (to 2 decimals). Executives 1.79 Middle managers 1.14 d. Compute the standard deviation of job satisfaction scores for both probability distributions (to 2 decimals). Executives 1.34 Middle managers 1.07 e. What comparison can you make about the job satisfaction of senior executives and middle managers? Senior executives have higher satisfaction with more variation

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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I have tried several different answers and can't figure out how I'm getting my variance wrong. 

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). Excel File: data05-21.xlsx a. What is the expected value of the job satisfaction score for senior executives (to 2 decimals)? 4.05 b. What is the expected value of the job satisfaction score for middle managers (to 2 decimals)? 3.84 c. Compute the variance of job satisfaction scores for executives and middle managers (to 2 decimals). Executives 1.79 Executives Middle managers d. Compute the standard deviation of job satisfaction scores for both probability distributions (to 2 decimals). Job Satisfaction Score 1 2 3 4 5 1.14 1.34 Middle managers 1.07 e. What comparison can you make about the job satisfaction of senior executives and middle managers? Senior executives have higher satisfaction with more variation ✓ IS Senior Executives 0.05 0.09 0.03 0.42 0.41 Probability IS Middle Managers 0.04 0.10 0.12 0.46 0.28
Transcribed Image Text: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). Excel File: data05-21.xlsx a. What is the expected value of the job satisfaction score for senior executives (to 2 decimals)? 4.05 b. What is the expected value of the job satisfaction score for middle managers (to 2 decimals)? 3.84 c. Compute the variance of job satisfaction scores for executives and middle managers (to 2 decimals). Executives 1.79 Executives Middle managers d. Compute the standard deviation of job satisfaction scores for both probability distributions (to 2 decimals). Job Satisfaction Score 1 2 3 4 5 1.14 1.34 Middle managers 1.07 e. What comparison can you make about the job satisfaction of senior executives and middle managers? Senior executives have higher satisfaction with more variation ✓ IS Senior Executives 0.05 0.09 0.03 0.42 0.41 Probability IS Middle Managers 0.04 0.10 0.12 0.46 0.28
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