2. [0.5/3.5 Points] DETAILS PREVIOUS ANSWERS MENDSTAT15 11.2.009. MY NOTES PRACTICE ANOTHER A psychologist wants to compare three methods for reducing hostility levels in university students. Eleven students were judged to have "great hostility," based on a certain psychological test (HLT). These students were then randomly divided into three groups-five were treated by Method A, three were treated by Method B, and the other three students were treated by Method C. All treatments continued throughout a semester, at the end of which the HLT test was given again. The results are shown in the table. Let Method A Scores on the HLT Test 72 85 75 66 78 B 55 75 70 C 78 97 86 and MB, respectively, denote the mean scores for the populations of extremely hostile students who were treated by Methods A and B. (a) Find a 95% confidence interval for (Round your answers to two decimal places.) 69.67 X to 80.73 (b) (c) Find a 95% confidence interval for B. (Round your answers to two decimal places.) X to 76.28 57.05 Find a 95% confidence interval for (A - MB). (Round your answers to two decimal places.) to