AMS 5 Study Guide - Midterm Guide: Kevin Bremner, Binge Drinking, Briey
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AMS 5 Full Course Notes
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A normal table is on the last page of this exam: a professor has ve di erent colored sweaters in his closet. During the day, his small children play in the closet, and enjoy rearranging the sweaters in a random order. Each morning, the professor picks the sweater o the top of the pile, and wears it to class. These studies were so encouraging that two randomized controlled experiments were done. The treatment groups were given large doses of vitamin supplements, while the control group just ate their usual diet. One experiment looked at colon cancer; the other at lung cancer. The rst experiment found no di erence in the death rate from colon cancer between the treatment group and the control group. The second experiment found that beta carotene (as a diet supplement) increased the death rate from lung cancer. 1 (c) the experiments could easily have reached the wrong conclusions due to confounding.
