Fig. 3From: On the Q statistic with constant weights in meta-analysis of binary outcomesEmpirical power at nominal level \(\alpha = .05\) vs \(\tau ^2\), for four approximations to the distribution of \(Q_F\) for log-odds-ratio and for two approximations to the null distribution of \(Q_{IV}\), when \(p_{iC} = .1\), \(f = .5\), equal sample sizes. The rows correspond to the combinations of \(\theta = 0\) and \(\theta = 1.5\) with \(n = 40\) and \(n = 100\)Back to article page