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🔀 Post-Hoc Multiple Comparisons
Tukey HSD / Dunnett — which group means differ significantly
When ANOVA shows a significant difference among groups, run a multiple comparison to find exactly which groups differ. Tukey HSD compares every pair of groups; Dunnett compares each group against a chosen control.
Method
Tukey HSD (all pairs)
Dunnett (vs control)
Input data (one group per line; values separated by space / comma / newline)
Significance level α
ANOVA Summary
F statistic
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p-value
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Between-group MS
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Within-group MS (MSE)
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Group Means and Confidence Intervals
Tukey HSD Pairwise Comparison Results
| Pair | Mean diff | SE | t/q | p (approx) | Decision |
|---|
About Multiple Comparisons
Post-hoc tests online: Tukey HSD, Bonferroni, Dunnett, LSD and Scheffe, with familywise error control and confidence intervals for group differences.
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