Fig. 5
From: A random effects meta-analysis model with Box-Cox transformation
Bias, RMSE and coverage probability of the I 2 or the ratio of IQR squares for the scenario of true ratio of IQR squares = 80.0% (large between-study variation). The I 2 from the normal random effects model (cross/solid line), and those of the ratio of IQR squares from the proposed model (black circle/broken line: Box-Cox transformation, black triangle/dotted line: Box-Cox transformation with the sign inversion)