2. A psychologist operating a group home for delinquent adolescents needs to show that it is successful at reducing delinquency. He samples ten adolescents living at home whom the police have identified as having problems, ten similar adolescents living in foster homes, and ten adolescents living in the group home. As an indicator variable he uses truancy (number of days truant in the past semester), which is already obtained from school records. On the basis of the following data, draw appropriate conclusions: Group Natural 15 18 Home Foster 16 14 Home Group 10 13 Home (Note: This exercise was taken from Howell, 2011) 19 20 14 14 22 Truancy 5 19 11 7 8 5 3 12 17 4 13 18 18 7 12 2 2.1 Assuming that the data are not normally distributed, test the hypothesis that there is no difference in the truancy among three groups of adolescents. Use a = .05 2.2 If the null hypothesis is rejected, conduct a pairwise comparison to determine the groups which had significant difference. Use a = .01. Make inference about the group which has the least truancy problem.