Use the data from Chapter 12 Data Set 3 to see if counseling adolescents at the beginning of the school year had a positive impact on their tolerance for other adolescents who are ethnically different from them. Assessments were made right before the treatment and then 6 months later. Did the program work? The outcome variable is score on a test of attitudes toward others, with possible scores ranging from 0 to 50; the higher the score, the more tolerance. Perform the analysis any way you want!