An educational researcher studied the change in student attitude towards mathema
ID: 3350948 • Letter: A
Question
An educational researcher studied the change in student attitude towards mathematics produced by an introduction to math course offered for freshman at a local community college. At the beginning of the term, a specially constructed attitude test was given to a random sample of 15 students, and then repeated at the end of the term. The attitude scores for this sample in the attitude test administered before and after are as follows:
Student
Pre-test
Post-test
1
50
51
2
33
34
3
40
37
4
62
60
5
25
28
6
18
22
7
32
36
8
41
44
9
41
46
10
24
32
11
63
63
12
15
25
13
33
49
14
52
53
15
19
34
Justify your selection of the appropriate parametric test and the significance level. (1 point)
Review any basic statistics test, and explain what are the assumptions of the parametric statistical test you selected? (1 point)
Bonus: If you were to perform a nonparametric statistical test on the same data set, which statistical test would you likely run and why? (2 bonus points)
Please note the last expert did not answer this part of the question. It is very important that this part be answered.
Student
Pre-test
Post-test
1
50
51
2
33
34
3
40
37
4
62
60
5
25
28
6
18
22
7
32
36
8
41
44
9
41
46
10
24
32
11
63
63
12
15
25
13
33
49
14
52
53
15
19
34
Explanation / Answer
since we are comparing two quantitative measurements taken from the same individual
and for before after,pre post
parametric statistical test is
paired t test.
nonparametric statistical test on the same data set, statistical test we would you likely run is Wilcoxon matched pairs signed rank test.
Its equivalent test is Wilcoxon matched pairs signed rank test.
its used when we want to make inferences about the mean of one population or the mean difference between two populations in a matched pairs setting.
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