Figure 16
From: An accurate test for homogeneity of odds ratios based on Cochran’s Q-statistic
Quadratic fit between the variance and the mean of Q. Quadratic fit for the relation between the variance of Q and the mean of Q. The studies for differing values of K are depicted as: K=5 black circles; K=10 red squares; K=20 blue diamonds; K=40 green triangles.