Parametric
Factorial analysis of variance
Evaluates the main effects of two factors and their interaction in one model.
Variables
- Dependent variableContinuous — 1
- FactorsNominal · Ordinal — 2–2
What it reports
Main effects and their interaction; F, df, p; partial η² with a 90% CI.
statsmodels · Open the accuracy report
When does this apply?
For a design in which one continuous outcome is compared across exactly two categorical factors at once — method × group, say. The headline result is the interaction, because that is the one question two separate one-way analyses cannot answer; both main effects still appear in the ANOVA source table with their own F, p and η²ₚ. Every cell must contain at least one observation.