Nonparametric versions of T test
| Test | Para vs Non Parametric | paired/unpaired | No of samples |
| Wilcoxon rank test | nonparametric | paired | 1 sample vs known value |
| Man Whitney U test | nonparametric | unpaired | 2 samples |
Other Nonparametric tests
| Test | Testing what |
| chi square, fisher exact | frequencies/proportion |
| mann whitney u, kruskal wallis, one way anova | categorical |
| wilcoxon rank sum test, sign test | ordinal paired variable |
kruskal wallis is >2 samples, chi square is >2 categorical
Mcnemars test
- Paired variables
- Null = characteristic is even in the two groups