〈e〉 vs. planet radius bins for the sample of M dwarf planets (red points). The red error bars present the 16th and 84th percentiles of 〈e〉. The red histogram represents the number of M dwarf planets in each radius bin (right-hand vertical axis). The median logistic sigmoid model is plotted in dark blue. The 16th and 84th percentiles of the logistic sigmoid are denoted by the dark blue shaded regions.