One-Way ANOVA Calculator
Three Groups
ANOVA for three groups (3 values each)
From Summary Statistics
ANOVA from group means, std devs, and sample sizes
Formula
F = MS_between / MS_within, where MS = SS / df
Frequently Asked Questions
What is one-way ANOVA?
One-way analysis of variance (ANOVA) tests whether there are statistically significant differences between the means of three or more independent groups.
When should I use ANOVA instead of multiple t-tests?
When comparing three or more groups, ANOVA controls the overall Type I error rate. Running multiple t-tests inflates the chance of a false positive.
You may also need
+
Two-Sample T-Test Calculator
Free two-sample t-test calculator. Compare the means of two independent groups with t-statistic, degrees of freedom, and significance estimation.
Math+
Kruskal-Wallis Test Calculator
Free Kruskal-Wallis test calculator. Non-parametric alternative to one-way ANOVA for comparing three or more independent groups using ranks.
Math+
Effect Size Calculator (Cohen's d)
Free effect size calculator. Calculate Cohen's d, Hedges' g, and other effect size measures to quantify the magnitude of differences between groups.
Math