A post-hoc statistical test (Tukey's HSD - Honestly Significant Difference) used for pairwise comparisons between group means after ANOVA. It controls the family-wise error rate while maintaining reasonable statistical power.
Named after American statistician John Wilder Tukey (1915-2000), who developed this and many other statistical methods. The 'Honestly Significant Difference' name reflects Tukey's emphasis on honest, rigorous statistical practice.
Tukey's test strikes the perfect balance between being a statistical perfectionist and a practical researcher - it's less conservative than Bonferroni but more rigorous than doing no correction at all, making it the 'Goldilocks' of multiple comparison tests!
Complete word intelligence in one call. Free tier — 50 lookups/day.