Miller XXXXXXXXXXexamined the energy drink consumption of college undergraduates and found that males use energy drinks significantly more often than females. To further investigate this phenomenon,...

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 m = 1.85 energy drinks per month, and that the distribution of monthly consumption scores is approximately normal with a standard deviation of s = 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 a = .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 a = .01.