identify at least one cofounding variable that may compromise the validity of this inference and support your choice

2. Make Mine a Large in the 2000 New York Times piece "Excess Pounds, but Not Too Many; May Lead to Longer Life,\" author Roni Caryn Rabin reported: Being overweight won't kill youit may even help you live longer. That's the latest from a study that analyzed data on 11,326 Canadian adults, ages 25 and older, who were foliowed 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.!, of 18.5 to 24.9, By contrast, people who were underweight, with a B.MI. under 18.5, were more likely to die than those of average dying was 73% higher than that of normal weight people, a. Although this article doesn't describe an experiment, it d overweight may lead to a longer life, Identify at least one compromise the validity of this inference and t yo