1.The data from Exercise 16.27 was analyzed using the Compare Means/Oneway ANOVA procedure on SPSS. The output is copied below.

+Oneway Descriptives Adj score for colisions 95% Confidence Interval for Mean N Mean Sid. Deviation Sid. Error Lower Bound Upper Bound Minimum Maximum Nonsmoker 9.93 6.006 1.551 6.61 13.26 17 Delayed Smoker 6.80 5.441 1.405 3.79 9.81 17 Active Smoker 2.33 2.289 -591 1.07 3.60 G Total 45 6.36 5.701 850 4.64 8.07 ANOVA Adj score for colisions Sum of Squares of Mean Square F Sig. Between Groups 437.641 218.822 3.258 1000 Within Groups 992.667 42 23.635 Total 1430.311 44 Post Hoc Tests Multiple Comparisons Dependent Variable: Adj score for collisions LSD 95% Confidence Interval (1) Smoking (J) Smoking Mean Difference Sto Lower Upper Condition Condition Error Sig Bound Bound Nonsmoker Delayed Smoker 3.133 1.775 | 1085 3.72 Active Smoker 7.600 1.775 | .000 4.02 11.18 Delayed Smoker Nonsmoker 3.133 1.775 1085 -6.72 45 Active Smoker 1.467 1.775 .016 188 8.05 Active Smoker Nonsmoker -7.600 1.775 .000 -11.18 -4.02 Delayed Smoker -4.467 1.775 .016 8.05 -88 . The mean difference is significant at the 0.05 level