Data Set 15 “Passive and Active Smoke” in Appendix B lists measured cotinine levels from a sample of subjects who smoke, another sample of subjects who do not smoke but are exposed to environmental tobacco smoke, and a third sample of subjects who do not smoke and are not exposed to environmental tobacco smoke. Cotinine is produced when the body absorbs nicotine. Use a 0.01 significance level to test the claim that the three samples are from populations with the same median. What do the results suggest about a smoker who argues that he absorbs as much nicotine as people who don’t smoke? 

Data Set 15: Passive and Active Smoke SMOKER 362 210 400 520 360 ETS 1.700 0.029 0.042 28.700 0.520 NOETS 0.046 0.124 0.030 0.011 0.011