Distributions of ﹩\hat{H}_{0}﹩ inferred from the cluster apparent core radii compared to the assumed value of H₀, a scatterplot of ﹩\hat{H}^{+}_{0}﹩ vs. ﹩\hat{H}^{-}_{0}﹩, and the distribution of apparent cluster ellipticities for the optimal sample of 1000 triaxial beta model clusters. This sample produces a distribution of apparent cluster ellipticities that is consistent with the subset of the Mohr et al. (1995) sample (see text). Distribution mean values are indicated by dashed lines (value of sample mean and deviation above line); the dashed line on the scatterplot indicates where the cluster appears circular. The dotted line histogram is that of the subset of the Mohr et al. (1995) X‐ray clusters described in the text (full scale for its frequency is 0–20).