Statistics Kingdom

Mean Test Calculators

Z-tests, T-tests, rank tests, proportion tests and ANOVA — pick the test that matches your data and get the full result, step by step.

13 free calculators Step-by-step results No signup
Z-test Calculator The all-in-one Z-test — one or two samples, means and proportions, when σ is known. Open calculator T-test Calculator The all-in-one T-test — one sample, two samples or paired, when σ is unknown. Open calculator

One sample 3 tests

Z One Sample Proportion proportion Z-test Z One Sample Z-Test mean · σ known t One Sample T-Test mean · σ unknown

Two independent samples 5 tests

Z Two Proportions Z-Test compare proportions Z Two Sample Z-Test means · σ known t Two Sample T-Test pooled · equal variances t Welch's T-Test unequal variances U Mann-Whitney U Test ranks · non-parametric

Paired samples 2 tests

t Paired T-Test before / after W Wilcoxon Signed Rank paired · non-parametric

Three or more groups 1 hub

F ANOVA & MANOVA compare 3+ groups
Which test should I use?
  • σ known → Z-test  ·  σ unknown → T-test
  • Same subjects, measured twice → paired tests
  • Skewed or ordinal data → rank tests (U, W)
  • Three or more groups → ANOVA
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