The Nurses Health Study has interviewed a sample of more than 100,000 femaleregistered
Chapter 0, Problem 8.17(choose chapter or problem)
The Nurses Health Study has interviewed a sample of more than 100,000 femaleregistered nurses every two years since 1976. The study finds thatlight-to-moderate drinkers had a significantly lower risk of death than eithernondrinkers or heavy drinkers. The Nurses Health Study is(a) an observational study.(b) an experiment.(c) Cant tell without more information.
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