Fig. 2
From: A random effects meta-analysis model with Box-Cox transformation
Bias, RMSE and coverage probability of the overall mean or the overall median for the scenario of the number of studies k=20. The overall mean from the normal random effects model (cross/solid line), and those of the overall median from the proposed model (black circle/broken line: Box-Cox transformation, black triangle/dotted line: Box-Cox transformation with the sign inversion)