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McNemar's Test


 
Based on 2x2 tables for matched pairs data.


 post-test pass
post-test fail
pre-test pass
n11
n12
pre-test fail
n21
n22


The test statistic differs from the more familiar chi-square test for association in that, for McNemar's test for matched-pairs, it is based only on cells n12 and n21.



StatSoft Nonparametric Tests
 
StatSoft McNemar chi-square test

Wikipedia McNemar test