Dear all,

I want to perform paired Wilcoxon signed ranks test on my data.
I have pairs defined by ID and TIME variables.

How can I calculate difference in variables q1, q2 in each pair?

TIME ID q1 q2
1 1187 3 2
1 1706 3 3
1 1741 2 4
2 1187 3 2
2 1706 3 3
2 1741 2 4

Please, any clue!
:)


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Vlatka Matkovic Puljic
+32/ 485/ 453340

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