Expected dispersion from the non-parametric MRR (Ning et al. 2018) compared to dispersion in mass and density from the error-accommodation method. Red solid lines show intrasystem dispersion D_err and the corresponding standard deviation (light-red shadowed regions). From left to right the 10⁵ random distributions from MRR are obtained for masses, and densities of adjacent planets in the main sample, and for masses, and densities of adjacent planets in the HCR sample. The blue dash-dotted and black dashed lines indicate mean and median values, respectively. The solid blue line indicates the best-fitted probability density function (PDF) of the normal distribution. The y-axis shows the probability density (the probability per unit on the x-axis).