Question

Problem A Subject Pretest Posttest Change (+/-) 1 50 60 2 56 90 3 87 84 4 94 95 5 85 89 6 75 78 7 96 94 8 84 80 9 75 76 10 75 79 11 79 80 12 80 86 13 85 86 14 83 85 15 75 80 Fifteen randomly selected students were tested on statistical knowledge before the first day of instruction and then at the end of the semester. Using a sign test with an alpha level of .05two-tailed, determine whether the data suggest there was a significant difference between the pretest and posttest scores. Number participants with grades which improved: Two-tailed probability obtained (calculated): Decision: [] Reject the null hypothesis [] Fail to reject the null hypothesis

          Problem A

Subject Pretest Posttest Change (+/-)
1 50 60
2 56 90
3 87 84
4 94 95
5 85 89
6 75 78
7 96 94
8 84 80
9 75 76
10 75 79
11 79 80
12 80 86
13 85 86
14 83 85
15 75 80

Fifteen randomly selected students were tested on statistical knowledge before the first day of instruction and then at the end of the semester. Using a sign test with an alpha level of .05two-tailed, determine whether the data suggest there was a significant difference between the pretest and posttest scores.

Number participants with grades which improved:

Two-tailed probability obtained (calculated):

Decision: [] Reject the null hypothesis [] Fail to reject the null hypothesis

Problem A

Subject Pretest Posttest Change (+/-)
1 50 60
2 56 90
3 87 84
4 94 95
5 85 89
6 75 78
7 96 94
8 84 80
9 75 76
10 75 79
11 79 80
12 80 86
13 85 86
14 83 85
15 75 80

Fifteen randomly selected students were tested on statistical knowledge before the first day of instruction and then at the end of the semester. Using a sign test with an alpha level of .05two-tailed, determine whether the data suggest there was a significant difference between the pretest and posttest scores.

Number participants with grades which improved:

Two-tailed probability obtained (calculated):

Decision: [] Reject the null hypothesis [] Fail to reject the null hypothesis

Added by Edward R.

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