Data Set 15 “Passive and Active Smoke” in Appendix B includes measured serum cotinine levels (mg/mL) from the three groups of subjects: 902 smokers, 433 nonsmokers exposed to tobacco smoke, and 358 nonsmokers not exposed to tobacco smoke. When nicotine is absorbed by the body, cotinine is produced. The results from analysis of variance are shown in the accompanying XLSTAT display. Use a 0.05 significance level to test the claim that the three samples are from populations with the same mean. What do the results suggest about the effects of secondhand smoke? 

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