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Combatting Midday Drowsiness A researcher wishes to see if the five ways (drinking
Chapter 11, Problem 6(choose chapter or problem)
Combatting Midday Drowsiness A researcher wishes to see if the five ways (drinking decaffeinated beverages, taking a nap, going for a walk, eating a sugary snack, other) people use to combat midday a 0.05 drowsiness are equally distributed among office workers. A sample of 60 office workers is selected, and the following data are obtained. At a 0.10 can it be concluded that there is no preference? Why would the results be of interest to an employer? Method Beverage Nap Walk Snack Other Number 21 16 10 8 5
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QUESTION:
Combatting Midday Drowsiness A researcher wishes to see if the five ways (drinking decaffeinated beverages, taking a nap, going for a walk, eating a sugary snack, other) people use to combat midday a 0.05 drowsiness are equally distributed among office workers. A sample of 60 office workers is selected, and the following data are obtained. At a 0.10 can it be concluded that there is no preference? Why would the results be of interest to an employer? Method Beverage Nap Walk Snack Other Number 21 16 10 8 5
ANSWER:At a 0.05 (with 5 categories), it cannot be concluded that there is no preference due to the sample size being too low. Given a larger sample size, a chi-square test would provide more accurate results.
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