In January 2012, the Harvard Health Letter reported that moderate consumption of coffee is associated with a
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In January 2012, the Harvard Health Letter reported that “moderate consumption of coffee is associated with a lower risk” of stroke. Is this conclusion likely to be the result of an observational study or a controlled experiment? Is it saying that coffee lowers the risk of stroke?
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Related Book For
Essential Statistics
ISBN: 9780134134406
2nd Edition
Authors: Robert Gould, Colleen N. Ryan, Rebecca Wong
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