Statistics › Section K · The chi-square distribution › Topic K.4
Test for homogeneity
Do three stores see the same payment mix? Do two regions back the same candidate? The homogeneity test compares one categorical variable's distribution across several populations - the same chi-square arithmetic as independence, built on a different design.
In this topic
- One variable, several populations
- The null: same distribution everywhere
- Identical arithmetic, different design
- Worked example: three stores' payment mixes
- Worked example: reading the stores' residuals
- Choosing independence or homogeneity
- Conditions: each sample must qualify
- Common mistakes to avoid
- Key takeaways
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