In Exercises 5–20, assume that the two samples are independent simple random samples selected from
10. Second-Hand Smoke Data Set 12 “Passive and Active Smoke” in Appendix B includes cotinine levels measured in a group of nonsmokers exposed to tobacco smoke (n = 40,
a. Use a 0.05 significance level to test the claim that nonsmokers exposed to tobacco smoke have a higher mean cotinine level than nonsmokers not exposed to tobacco smoke.
b. Construct the confidence interval appropriate for the hypothesis test in part (a).
c. What do you conclude about the effects of second-hand smoke?
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- Big Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt