Question: Consider an experiment to determine the effects of alcohol and
Consider an experiment to determine the effects of alcohol and of marijuana on driving. Five randomly selected subjects are given alcohol to produce legal drunkenness and then are given a simulated driving test (scored from a top score of 10 to a bottom score of 0). Five different randomly selected subjects are given marijuana and then the same driving test. Finally, a control group of five subjects is tested for driving while sober. Given the following driving test scores, test for the significance of differences among means of the following groups:
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