Question: Hypothesis test for Effect of Marijuana Use on College Students. In a study of the effects of marijuana use, light and heavy users of marijuana in college were tested for memory recall, with the results given below (based on data from "The Residual Cognitive Effects of Heavy Marijuana Use in College Students," by Pope and Yurgelun-Todd, Journal of the American Medical Association, Vol. 275, No. 7). Use a 0.05 significance level to test the claim that the population of heavy marijuana users has a standard deviation different from that of light users.

Items sorted correctly by light marijuana users: n = 64, \(\bar{X}=53.3\), s = 3.6

Items sorted correctly by heavy marijuana users: n = 51.3, \(\bar{X}=51.3\), s = 4.5

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