Miller (2008) examined the energy drink consumption of college undergraduates and found that males use energy drinks significantly more often than females. To further investigate this phenomenon, suppose that a researcher selects a random sample of n = 36 male undergraduates and a sample of n = 25 females. On average, the males reported consuming M = 2.45 drinks per month and females had an average of M = 1.28. Assume that the overall level of consumption for college undergraduates averages μ – 1.85 energy drinks per month, and that the distribution of monthly consumption scores is approximately normal with a standard deviation of σ = 1.2.
a. Does this sample of males support the conclusion that males consume significantly more energy drinks than the overall population average? Use a one-tailed test with α –. 01
b. Does the sample of females support the conclusion that females consume significantly fewer energy drinks than the overall population average? Again, use a one-tailed test with α – .01.
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Essentials of Statistics for The Behavioral Sciences (MindTap Course List)
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