Fits to the CD of M_ZAMS of SN II progenitors in the full sample. Top left: CD of M_ZAMS derived in our work for the full sample (red triangles and the error bars), corresponding to the median and the 68% confidence limit of the distribution presented in Fig. 5 as shaded contours, in comparison with the model CD constructed with the median values of the marginal distributions of the parameters (shaded contours). Bottom left: corner plot of the joint posterior probability distribution of the parameters. Dashed lines indicate the 16th, 50th, and 84th percentiles of the distributions. The right panels show the same as the left panels but when the power-law slope is fixed to Γ = −2.35.