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Suppose the historical average work week was 39.2 hours and SD was 4.8 hours as reported by the Department of Labor. This year a study of 112 workers showed a mean of 38.5 hours. Test whether the workweek is the same or significantly shorter due to the recession. (Left tail. Ho: M=> 39.2). Use a .02 significance level.

a. Critical Value:

b. What is the appropriate calculated T or Z:

c. Statistical conclusion:

d. Practical conclusion:

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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