1. The data below are aggression scores for two groups. Calculate a t-test. Is there a statistically significant difference between the two groups on aggression? Describe your findings in a sentence.

Group 1 Aggression Scores 8 5 7 9 7 6 5 3 4 4

Group 2 Aggression Scores. 15 13 12 8 11 14 9 10 9 10

2. Below are data on seat belt use and education for 100 men. Calculate a X²to determine if there is an association between use of seat belts and education level.

Used Seat Belts

Educational Level

Yes

No

Not college graduate

24

36

College graduate

30

10

Explain in a complete sentence, what the answer means.