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In: Statistics and Probability

Lead to Longer Life/' author Roni Caryn Rabin reported: Being overweight won't kill you—it may even...

Lead to Longer Life/' author Roni Caryn Rabin reported:

Being overweight won't kill you—it may even help you live (ofiger.. That's the latest from a study that analyzed data on 11,326 Canadian adults, ages 25 and older, who were followed over a 12-year period. The report... found that overall, people who were overweight but not obese—defined as a body mass index of 25 to 29.9—were actually less likely to die than people of normal weight, defined as a B.M.I. of 18.5 to 24.9.

Question

1, Although this article doesn't describe an experiment, it does imply that being a little overweight may lead to a longer hfe. Identify at least one confounding variable that may compromise the validity of this inference. Support your case.

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