Wilcoxon Matched pair signed rank test

Small sample (n < 25)

Steps

for example of data set:

Use Wilcoxon Matched pair signed rank test to determine the equality of effectiveness of two types of drugs in suppressing pair from following data

Patient No.	Drug A	Drug B
1	6.5	3.5
2	3.7	3.7
3	3.9	4.7
4	6.7	5.0
5	6.2	5.6
6	6.7	4.3
7	6.1	5.4
8	4.3	5.8
9	5.5	4.3
10	6.8	4.3
11	5.4	5.4
12	4.0	4.1
13	5.7	4.1
14	3.9	4.2
15	3.6	3.7
16	4.9	4.1
17	3.9	5.4
18	5.8	3.7
19	4.9	4.1
20	4.9	4.1

• Goto variable view and add the variables

  

  Variable View
• Goto the data view and add the data

• Click on Analyze tab > NonParametric Tests > Legacy Dialogs > 2 Related Samples.

  

  Step
• Add the required variable in Test Variable List and click Options.

  

  Dialog
• Click Descriptives and Quartiles and click Continue.

  

  Dialog
• Required Output:

  

  Output

Since, p < 0.05, it is significant.