Question: A psychologist wants to compare the happiness of single people with pets to the happiness of singles without pets. A group of single pet owners is compared to single non-pet owners using a mood survey. The pet owners are matched one to one with the non-pet owners on other variables known to be related to the mood scores such as incoMeand health. Is there a significant difference at the .01 level in the mood scores for the non-pet owners versus the pet owners? A high score indicates more happiness.

Pair Pet Owner Non-Pet owner

1 70 60

2 94 88

3 70 74

4 60 55

5 82 75

6 88 81

7 64 69

8 92 86

9 91 83

10 78 71

11 83 83

12 85 82