Tobacco and Alcohol in Children’s Movies Refer to Data Set 13 “Alcohol and Tobacco in Movies” in Appendix B and use the times (seconds) that animated Disney movies showed the use of tobacco and the times that they showed the use of alcohol. Use a 0.05 significance level to test the claim that the mean of the differences is greater than 0 sec so that more time is devoted to showing tobacco than alcohol. Larger Data Sets. In Exercises 17–20, use the indicated Data Sets from Appendix B.

The complete data sets can be found at www.TriolaStats.com. Assume that the paired sample data are simple random samples and the differences have a distribution that is approximately normal.