“…, K) T , and specify the variance component matrices Σ φ and Σ e based on the marginal variances and ICCs. To further assess the accuracy of our approximate power procedure under unequal cluster sizes, we consider mean cluster size m = 60, and coefficient of variation of cluster size CV ∈ {0, 0.2, 0.4, 0.8}, representing different degrees of variability in cluster size used in previous simulations (Li and Tong, 2021). When CV > 0, the cluster sizes m i 's are drawn from a Gamma distribution with shape and scale parameter 1/CV 2 and mCV 2 ), rounded to the nearest integer.…”