Statistical Calculators

Here you'll find a set of statistics calculators that are intuitive and easy to use. Included are a variety of tests of significance, plus correlation, effect size and confidence interval calculators.

Not sure which test to use? Try our Which Statistics Test? wizard.

T-Tests

T-Test for 2 Independent Means

Compare means of two independent groups

→

T-Test for 2 Dependent Means

Paired samples t-test

→

T-Test for Single Sample

Compare sample mean to population mean

→

ANOVA

One-Way ANOVA (Independent)

Compare means across 3+ independent groups

→

One-Way ANOVA (Repeated)

Compare means across 3+ related groups

→

Chi-Square Tests

Chi-Square (2×2 Table)

Test association in 2×2 contingency table

→

Chi-Square (5×5 Table)

Test association in larger contingency tables

→

Chi-Square (Goodness of Fit)

Test if data fits expected distribution

→

Non-Parametric Tests

Mann-Whitney U Test

Non-parametric alternative to independent t-test

→

Wilcoxon Signed-Rank

Non-parametric alternative to paired t-test

→

Kruskal-Wallis Test

Non-parametric alternative to ANOVA

→

Friedman Test

Non-parametric alternative to repeated ANOVA

→

Other Tests

Z-Test (2 Proportions)

Compare proportions between two groups

→

Fisher Exact Test

Exact test for 2×2 tables (small samples)

→

Binomial Test

Test if observed proportion differs from expected

→

Levene's Test

Test equality of variances

→