Cochran's Q Test Calculator

Test for differences in proportions across multiple related groups with binary outcomes.

Binary Data Matrix

Data (rows=subjects, cols=treatments, 0/1 values)

Significance Level (alpha)

Cochran's Q Statistic

0.5000

Not Significant

dfDegrees of Freedom

2

pP-Value

0.778801

cvCritical Value

5.991

nSubjects

5

Treatment Totals

T1: 3T2: 3T3: 4

Formula

Q = (k-1)[k*Sum(Gj^2) - N^2] / [k*N - Sum(Li^2)]