Answers to 9.2 finding group differences

1. Does students differ on English scores by rank (i.e., freshmen, sophomore, junior, senior)?

   • Perform Tukey’s post hoc tests. What are the results of the post hoc comparison? (answer = trick question! you wouldn’t perform them because the F-test is not significant)

2. Does smoking status (Smoking: Nonsmoker = 0, Past smoker = 1, Current smoker = 2) relate to sprint time?

   • Perform Tukey’s post hoc tests. What are the results of the post hoc comparison? (answer = Nonsmokers had significantly faster sprint times than current smokers)