Doll and Hill, 1950. An important historical casecontrol completed by Doll and Hill found that 647 of

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Doll and Hill, 1950. An important historical case–control completed by Doll and Hill found that 647 of the 649 lung cancer cases were smokers. In contrast, 622 of 649 controls smoked.u Display these data as a 2-by-2 table and calculate the odds ratio associated with smoking. Include a 95% confidence interval for the OR.

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