Tests for categorical data and for data that do not meet the assumptions of t tests and ANOVA.
Chi-Square Test of Independence Calculator
Free chi-square test of independence calculator. Paste a contingency table to get expected counts, χ², df, p-value, Cramér's V and an APA 7 sentence.
Mann-Whitney U Test Calculator
Free Mann-Whitney U test calculator. Paste two groups from Excel and get ranks, U, z, p, effect size r and an APA 7 sentence. Handles ties like SPSS.
Wilcoxon Signed-Rank Test Calculator
Free Wilcoxon signed-rank test calculator for paired, non-normal data. Get positive and negative ranks, T, z, p, effect size r and an APA 7 sentence.
Kruskal-Wallis Test Calculator with Dunn Post Hoc
Free Kruskal-Wallis H test calculator with Dunn's post hoc (Bonferroni). Paste groups from Excel and get H, p, epsilon squared and an APA 7 write-up.
Which one do I need?
- Chi-Square Test of Independence Calculator: The chi-square (χ²) test of independence checks whether two categorical variables are associated, for example gender and whether students use online learning (yes/no).
- Mann-Whitney U Test Calculator: The Mann-Whitney U test (also called the Wilcoxon rank-sum test) compares two independent groups when the data are ordinal or not normally distributed, for example urban and rural students’ answers on a 5-point Likert item.
- Wilcoxon Signed-Rank Test Calculator: The Wilcoxon signed-rank test compares two related measurements, such as scores before and after an intervention, when the differences are not normally distributed or the data are ordinal.
- Kruskal-Wallis Test Calculator with Dunn Post Hoc: The Kruskal-Wallis H test compares three or more independent groups when the data are ordinal or not normally distributed.