You are going to conduct a study to see if smoking cannabis increases anxiety. To test this, you
separate 100 college students into two groups. One group is instructed to smoke cannabis for 15
minutes each day for a month and the other is not allowed to smoke during the experimental time.
All other variables are held constant and the same between the two groups. Before and after the
experiment each subject will be given a survey to measure anxiety and the results will




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