Statistical analysis of the results of the simulations starting from 28 embryos, each with 3 M_⊕. The x-axis of left plots reports the value of f_I at fixed f_d, given at the title of each plot. Similarly, the x-axis of right plots reports the value of f_d at fixed f_I. The dot, slightly displaced to the left, is the mean mass of the largest core surviving beyond Saturn, computed over the corresponding ten simulations. The thick vertical bar is the rms deviation of this quantity. The thin bar shows the excursion of the same quantity from minimum to maximum. The square in the middle and related bars are the same, but for the second-largest core. The mass scale is reported left of the diagram. The cross, slightly displaced to the right, reports the mean number of embryos/cores surviving beyond Saturn, to be read against the scale on the right hand side. Again, the thick bar is for the rms deviation and the thin bar for the minimum-maximum quantity. (For the discussion – see Sect. 4.)