Question806 Rati Poor 51 74 57 29 19 37 Test the hypothesis, at 5% level of significance, that rating is not related to age group. 400 120 140 140 TASK 4 A clinical psychologist wishes to compare three methods for reducing hostility levels in university students. A certain psychological test called hostility level test (HLT) was used to measure the degree of hostility. High scores on this test were taken to indicate high hostility. A total of eleven students were tested; five students were selected at random from among the eleven problem cases and treated by method A. From the remaining 6, three were taken at random and treated by method 18 B. The other three students were treated by method C as indicated in following table: SCORES ON THE HLT TEST Method A 73 83 76 68 80 Method B 54 74 71 Method C 79 95 87 (a) Perform an analysis of variance for this experiment. 133 2 85 133×120 182x140. 85 x 140 (b) Do the data provide sufficient evidence to indicate a difference in mean student response for the three methods after treatment? DUE: FRIDAY 23RD AUGUST, 2024 BEFORE 17:00HRS KASHOKA.B UNZA KACE 21 Page 2 450