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.

Could you show the calculations and the explanation for this question ?

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