Problem 4, Job satisfaction [3 points] A company institutes an exercise break for its workers to see if it will improve job satisfaction, as measured by a questionnaire that assesses workers' satisfaction. Scores for 10 randomly selected workers before and after the implementation of the exercise program are shown in the table below.

Worker Job Satisfaction Index Number Before After 34 33 28 36 29 50 45 41 26 37 27 41 24 39 15 21 15 20 10 27 37