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41. In a cohort study of smoking and lung cancer, the incidence of lung cancer among...

41. In a cohort study of smoking and lung cancer, the incidence of lung cancer among smokers was found to be 9/1,000 and the incidence among nonsmokers was 1/1,000. From another source we know that 45% of the total population were smokers

a. The incidence of lung cancer attributable to smoking in the total population is:

b. The proportion of the risk in the total population that is attributable to smoking is:

Math   Statistics-And-Probability   
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