Distributions of samples of (v/σ)_HL, which describe the rotation strength for each cluster in this analysis. These distributions are shown for the overall cluster (gray) and each of its populations (P1:green, P2:orange, P3:violet). The 16th, 50th, and 84th percentile for each distribution are shown on top of the corresponding distribution. For distributions that peak at zero, only the 95th percentile is shown, to provide an upper limit on the rotation strength.