Question: n a heart disease case-control study, the probability that a case had been a smoker was 70%, and the probability that a control had been

n a heart disease case-control study, the probability that a case had been a smoker was 70%, and the probability that a control had been a smoker was 20%. According to this study, the relative risk for smoking and heart disease is . Question 20 options: 1.4 0.3 3.5 2.7

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