Question: Hypothesis Test for Effect of Marijuana Use on college Students.

In the study of the effect of marijuana use, light and heavy users of marijuana in college were tested for memory recall with the results given below. Use a 0.05 significance level o test the claim that the population of heavy marijuana user 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 sort correctly by heavy marijuana users:

n=65, \(\bar{X}\) =51.3, s=4.5

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