SPSS nonparametric tests are mostly used when assumptions aren’t met for other tests such as ANOVA or t-tests. Second, nonparametric tests are suitable for ordinal variables too. In rare cases they may have more statistical power than standard tests.
Not sure which (nonparametric) test to use? You’ll quickly find the answer in Simple Overview Statistical Comparison Tests.
Nonparametric Tests – One Sample
- SPSS Kolmogorov-Smirnov Test for Normality
- Binomial Test – Simple Tutorial
- SPSS Binomial Test
- Z-Test and Confidence Interval Proportion Tool
- SPSS Sign Test for One Median – Simple Example
Nonparametric Tests – 2 Independent Samples
- SPSS Mann-Whitney Test – Simple Example
- Z-Test and Confidence Intervals Independent Proportions Tool
- SPSS Median Test for 2 Independent Medians
Nonparametric Tests – 3(+) Independent Samples
Nonparametric Tests – 2 Related Samples
- SPSS Wilcoxon Signed-Ranks Test – Simple Example
- SPSS McNemar Test
- SPSS Sign Test for Two Medians – Simple Example