One-way ANOVA
Compare three or more groups, with variance explained and every pair tested.
Runs in your browser
Paste at least two values into each of the three groups.
Formula
F = MS between ÷ MS within; ω² = (SS_b − df₁·MS_w) ÷ (SS_total + MS_w)ModelOne-way ANOVA, Welch pairwise with Holm correction
- Holm’s sequentially rejective multiple test procedure — Scandinavian Journal of Statistics, 1979
- Welch’s correction for unequal variances — Biometrika, 1947
Calculated in your browser. Nothing you entered was sent anywhere.
If each treatment is being compared only against the control rather than against every other group, Dunnett’s test is more powerful than the all-pairs correction used here.
About this tool
Runs one-way ANOVA on pasted groups and reports the proportion of variance explained before the p-value. Follows up with every pairwise comparison by Welch’s t-test, corrected together using Holm’s method.
Related tools
- t-test calculator — Compare two groups and get the effect size and interval, not just a p-value.
- Multiple testing correction — Adjust a list of p-values by Benjamini–Hochberg or Bonferroni.
Science last reviewed .