(Hypothetical.) In a clinical trial, data collection usually starts at "baseline," when the subjects are recruited into the trial but before they are assigned to treatment or control. Data collection continues until the end of followup. Two clinical trials on prevention of heart attacks report baseline data on smoking, shown below. In one of these trials, the randomization did not work. Which one, and why? Number of persons Percent who smoked (i) Treatment Control 1,012 49.3% 997 69.0% Treatment 995 59.3% (!!) Control 1,017 59.0%?  plo47