McNemar Test Calculator
Test for paired nominal data in a 2x2 table.
McNemar chi-sq (continuity)
4.0500
McNemar chi-sq (no continuity)5.0000
Total Discordant20
McNemar chi-sq (continuity) vs Discordant b (+ then -)
Formule
## McNemar Test **chi2 = (|b-c|-1)^2 / (b+c)** For paired binary outcomes. Only discordant pairs matter.
Exemple Résolu
b=15, c=5.
- 01chi2 = 81/20 = 4.05
- 02df=1, significant at 0.05
Questions Fréquentes
When?
Paired binary data like before/after.
Why only discordant?
Concordant pairs give no info about change.
Small samples?
Use exact binomial if b+c < 25.
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