A study observes that the subjects in the study who say they exercise regularly reported only half
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a. Explain what this sentence means and how age could potentially explain the association between exercising and illnesses.
b. If age was not actually measured in the study and the researchers failed to consider its effects, could it be a confounding variable or a lurking variable? Explain the difference between a lurking variable and a confounding variable.
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Related Book For
Statistics The Art And Science Of Learning From Data
ISBN: 9780321755940
3rd Edition
Authors: Alan Agresti, Christine A. Franklin
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