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Suppose an observational study is conducted to investigate the smoking behaviors of male and female patients...

Suppose an observational study is conducted to investigate the smoking behaviors of male and female patients with a history of coronary heart disease. Among 220 men surveyed, 80 were smokers. Among 190 women surveyed, 95 were smokers. a. Estimate the odds ratio of smoking for male versus female patients with a history of coronary heart disease. b. Construct a 95% confidence interval for the odds ratio. c. Based on (a) and (b), would you reject H0: OR = 1 in favor of H1: OR does not = 1? Justify your answer briefly.

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S O of en Total num ber oF men - 220 Out of cohich 480 smoer Control is of women of cohich 95 smoker SmokerNon-smokerTotc Men 22O omen 95 d- 95 Odds ato of smokino males versus fem ale patients(c = a/b = axd -80x35 = 0.571 Standard errr γ。Floa odds rati о-2017 .95% Confidence interval 38 U.С. 0,8486 Since, odds vtioo.5J4 ies coithin Conideno interval , ence we can accep t Hoi

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