A pretest and posttest to the same sample of students. Assuming an alpha level of 0.01, determine if you are confident that the training was effective.

Participant	Pretest_Score	Posttest_Score
1	90.6	110.6
2	94.8	101.6
3	109.6	120.6
4	90.2	83.2
5	97.6	109.3
6	91.2	115.8
7	96.7	99.9
8	97.6	117.9
9	88.8	106.1
10	90.8	82.8
11	89.3	116.6
12	115.8	128.7
13	121.3	119.7
14	87.9	108.4
15	93.8	96.4