Figure C.1:

Root mean squared errors (RMSEs) for predicting $y^{\text{*}}$. The boxplots summarize the RMSE quantiles for the subsets within each acceptable family; here, the acceptable families use $\epsilon =0.01$ (left) and $\epsilon =0.20$ (right). The vertical lines denote RMSEs of competing methods and the average size of each acceptable family is annotated. The results suggest only minor sensitivity to the choice of $\epsilon$.