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In R fisher.test(matrix(c(a, c, b, d), nrow=2), alt = ) Hint 2
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In fact, e-cigarette users had a 42 percent higher risk of heart attack than non-smokers, according to a 2017 study
High School Students Lowest in 22 Years More Than a Quarter-Million Youth Who Had Never Smoked a Cigarette Used E-Cigarettes in 2013 Youth and Tobacco Use [PDF795 KB] Page last reviewed: June 20, 2017 Page last updated: June 20, 2017 Content source:
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