means
One-way ANOVA
Compare a continuous outcome across three or more groups.
Requirements
- continuous outcome
- one categorical factor
Avoid when
- major variance imbalance without Welch ANOVA
- covariate adjustment needed
Formula
F = MS_between / MS_within
Interpretation
Tests whether at least one group mean differs.
Worked example
Compare mean cholesterol across three independent diet groups.
Open example datasets