Early studies showed a disproportionate number of heavy smokers among lung cancer patients. One scientist theorized that

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Early studies showed a disproportionate number of heavy smokers among lung cancer patients. One scientist theorized that the presence of a particular gene could tend to make a person want to smoke and be susceptible to lung cancer.
(a) How would randomization settle this question?
(b) Would such a randomization be ethical with human subjects?
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Statistics Principles And Methods

ISBN: 9780470904114

7th Edition

Authors: Richard A. Johnson, Gouri K. Bhattacharyya

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