Diabetic patients often exhibit poor circulation of the extremities. Suppose pat
ID: 3353396 • Letter: D
Question
Diabetic patients often exhibit poor circulation of the extremities. Suppose patients’ circulation is assessed, and then, they are treated with special socks and shoes that facilitate blood circulation. After they wear the special clothes for a month, their circulation is reassessed and graded on a 7-point scale, from -3 (significant decline) to 0 (no change) to +3 (significant improvement). The number of patients given each score is tabulated as follows:
Circulation Improvement Score
Score
Number of Patients with Score
+3
4
+2
5
+1
7
0
5
-1
3
-2
2
-3
2
a) What appropriate nonparametric test can be used to determine whether a significant change in circulation has occurred?
b) Conduct the test you chose in part a). Report a conclusion and necessary work.
Circulation Improvement Score
Score
Number of Patients with Score
+3
4
+2
5
+1
7
0
5
-1
3
-2
2
-3
2
Explanation / Answer
a) Matt-Whitney test can be used to understand whether a treatment has made significant effects in a signle group => Use 2-sample Matt-Whitney test.
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b)
Aas concluded in the picture above, the two groups are DISTINCT and there is a significant effect of the treatment used.