1. Based on the data presented below, answer the following objectively

a. What is the pre-test mean score

b. What is the pre-test mean score?

c. What is standard deviation of the pre-test score?

d. What is standard deviation of the post-test score?

e. Is the difference between the pre-test score and post test score significant at 5% level of significance?

f. Is the difference between the pre-test score and post test score significant at 1% level of significance?

Student	Pre-test	Post-test
1	54	69
2	56	67
3	51	55
4	76	73
5	63	80
6	61	75
7	85	85
8	79	68
9	59	55
10	58	60
11	76	71
12	71	84
13	65	84
14	65	85
15	31	69
16	63	60
17	59	60
18	77	75
19	72	75
20	80	82
21	82	80
22	63	75
23	75	75
24	81	75
25	56	75