AI engineering glossary · Statistics inference
What is post-hoc test?
Post-hoc test (also called Tukey HSD): A follow-up comparison run after an overall test such as ANOVA finds a difference, to identify which specific groups differ. It adjusts for the many pairwise comparisons so the error rate stays controlled.
Post-hoc test: an example
After ANOVA shows the four coaching centres differ, Tukey's HSD indicates that centre B and centre D are the pair that differ.
Related terms
More Statistics inference terms
- Posterior distribution
- Potential outcomes framework
- Power analysis
- Practical significance
- Prior distribution
- Propensity score
- R-squared
- Randomisation
Where you learn it
Post-hoc test is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.