Stata Help

Running Nonparametric Analyses in Stata

Click on an analysis to learn how to run it.

• Chi-square (test for randomness with categorical outcomes)
  • Some theory behind a chi-square test

• Mann-Whitney U Test (nonparametric independent t-test)
• Kruskal-Wallis test (one way nonparametric ANOVA)
  • Some theory behind a Kruskal-Wallis & Mann-Whitney U test
• Wilcoxon Single Sample Test (nonparametric single sample t-test)
  • Some theory behind a Wilcoxon Single Sample Test
• Wilcoxon Two-Sample Test/Wilcoxon Signed Rank Test (nonparametric paired samples t-test)

• A Binomial Probability Test (for testing specific distributions with binomial Variables
  • Some theory behind a Binomial Probability Test 

Some Additional Tests of Note

• Sign Test from the online Handbook of Biological Statistics

Useful Resources for Nonparametric Tests

• JSTOR pdf link to an article proposing guidelines for adequate sample sizes in nonparametric tests