AI engineering glossary · Statistics inference
What is wilcoxon signed-rank test?
Wilcoxon signed-rank test: A rank-based test for paired data that asks whether the differences between paired measurements are centred at zero. It is the distribution-free counterpart of the paired t-test. It is useful for small samples where the differences look skewed.
Wilcoxon signed-rank test: an example
Rank the absolute before-and-after differences in 15 users' page-load times and check whether positive and negative ranks balance.
Related terms
More Statistics inference terms
- Z-test
- A/B test
- Adjusted R-squared
- Alternative hypothesis
- ANOVA
- Average treatment effect
- Bayesian inference
- Benjamini-Hochberg procedure
Where you learn it
Wilcoxon signed-rank test is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.