Wilcoxon Signed-Rank Test Calculator

Non-parametric paired comparison test.

W Statistic

23

W-23
Z Approximation-1.2551

W Statistic vs Non-Zero Pairs

Formule

## Wilcoxon Signed-Rank Test **W = min(W+, W-)** Rank absolute differences, sum positive and negative ranks separately.

Exemple Résolu

12 pairs, W+=55.

  1. 01W- = 78-55 = 23
  2. 02W = min(55,23) = 23

Questions Fréquentes

When vs paired t-test?

When differences are not normal.

Zero differences?

Exclude them, reduce n.

Tied ranks?

Average the tied ranks.

Apprendre

Understanding the Normal Distribution

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