How many subjects changed their smoking status after the treatment? Refer to the following table. The table
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How many subjects changed their smoking status after the treatment?
Refer to the following table. The table summarizes results from an experiment in which subjects were first classified as smokers or nonsmokers, then they were given a treatment, then later they were again classified as smokers or nonsmokers (based on data from Pfizer Pharmaceuticals in clinical trials of Chantix).
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After treatment Smoke Don't smoke Before Treatment Smoke 460 361 Don't Smoke 4 192
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