Question: Do workers on different shifts get different amounts of sleep

Do workers on different shifts get different amounts of sleep per week? Some people believe that shift workers who regularly work the graveyard shift (12:00 A.M.to 8:00 A.M.) or swing shift (4:00 P.M.to 12:00 A.M.) are unable to get the same amount of sleep as day workers because of family schedules, noise, amount of daylight, and other factors. To test this theory, a researcher samples workers from day, swing, and graveyard shifts and asks each worker to keep a sleep journal for one week. The following data represent the number of hours of sleep per week per worker for the different shifts. Use the Kruskal-Wallis test to determine whether there is a significant difference in the number of hours of sleep per week for workers on these shifts. Use α =.05.


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  • CreatedFebruary 19, 2015
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