Appendix B Data Sets. In Exercises 9–12, use the Kruskal-Wallis test with the data set in Appendix B. Passive and Active Smoke Data Set 12 “Passive and Active Smoke” in Appendix B lists measured...

Appendix B Data Sets.  In Exercises 9–12, use the Kruskal-Wallis test with the data set in Appendix B.

Passive and Active Smoke Data Set 12 “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?