Answers to 7.2 independent samples t-test

1. Does height differ by gender (Gender: male = 0, female = 1)?

   • Should you use a one-tailed or two-tailed hypothesis? (answer = two-tailed)

   • Which statistic should you use based on your assumptions? (answer = Mann Whitney U)

   • Does height differ by gender? (answer = yes)

2. Do athletes (Athlete: athletes = 1, non-athlete = 0) have faster sprint times than non-athletes?

   • Should you use a one-tailed or two-tailed hypothesis? (answer = one-tailed)

   • Which statistic should you use based on your assumptions? (answer = Mann Whitney U)

   • Do athletes have faster sprint times than non-athletes? (answer = yes)

3. Do students who live on campus (LiveOnCampus: on campus = 1, off campus = 0) have higher English scores than students who live off campus?

   • Should you use a one-tailed or two-tailed hypothesis? (answer = one-tailed)

   • Which statistic should you use based on your assumptions? (answer = Welch t-test)

   • Does students who live on campus have higher English scores? (answer = no)

4. Does athletic status relate to math scores?

   • Should you use a one-tailed or two-tailed hypothesis? (answer = two-tailed)

   • Which statistic should you use based on your assumptions? (answer = independent t-test)

   • Does athletic status relate to math scores? (answer = yes)