9. A random sample of 25 junior high school students was provided with intensive exposure to the workings of the criminal justice system. Their attitudes toward the system were tested before and...

Plzz explain with detail. Alpha. 0.05 consider

Extracted text: 9. A random sample of 25 junior high school students was provided with intensive exposure to the workings of the criminal justice system. Their attitudes toward the system were tested before and following the exposure. The test was scored so that a high score indicated a negative attitude while a low score was positive. The results are presented in the "pretest score" and "post test score" columns in the table: Individual Pretest score Posttest score 88 75 85 74 3 84 77 4 83 74 5 82 68 76 6. 81 7 80 64 79 78 9. 79 68 10 78 75 11 78 73 12 77 78 13 76 59 14 75 79 15 75 63 16 74 59 17 73 75 18 73 70 19 72 61 20 70 78 21 70 69 22 70 63 23 64 70 24 62 72 25 61 70 Do the pretest scores are significantly different from posttest scores?