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Test cases and controls of coffee

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Reference no: EM131716125

Question: In a case/control study of patients with gallstones, information on coffee consumption was obtained. Among the 80 controls, 35 reported drinking at least 4 cups of coffee per day, whereas 22 of the 82 cases drank 4 or more cups. Test whether cases and controls drink the same amount of coffee.

Reference no: EM131716125

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