Stress and diet study. Researchers at the University of South Florida investigated the effects of diet on the physiology and behavior of rats (USF News, Oct. 17, 2009). One group of rats was fed a typical American diet (40% fat, 40% protein, 20% carbohydrates); a second group of rats was fed an Atkins- type diet (70% fat, 20% protein, 10% carbohydrates); and, a third (control) group was fed rat chow. Assume the experiment utilized 50 rats. Use a random-number generator to randomly assign the rats to the three diet groups.
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