A researcher is interested in whether individuals' self-esteem scores are reduced after looking at an attractive peer. Participants completed the Rosenberg Self-Esteem Scale before viewing a picture of an attractive peer and again after viewing the picture. Their scores are below.

BEFORE AFTER

22 17

13 15

25 22

17 14

19 18

15 11

12 13

28 26

Enter the data into SPSS and perform the appropriate analyses at the .01 level of significance. Construct and interpret a 99% confidence interval, if appropriate.