The mnemonic
Chi for counts, T for two means, ANOVA for many
What each word stands for
- ChiChi-square for proportions in categories
- Tt-test for two means
- ANOVAAnalysis of variance for three or more means
Why it matters clinically
Helps pick the test quickly in a study design question.
Where it stops being reliable
Assumes normally distributed data; non-parametric alternatives apply otherwise.
Teaching aid, still awaiting independent review. Confirm facts in a standard source.