Redshift distribution of 5BZCat (top), the L_γ distribution of 4LAC-DR3 (middle) and the M_BH distribution of P17 (bottom) are used to access the reliability of the statistical approaches. The left panels show the result of the logrank (blue points) and Peto logrank tests (orange squares) performed on the original population (only measurements) vs. comparison subsamples of progressively larger size, constructed by randomly selecting measured values from the parent dataset. The pvalue is shown as a function of the size of the selected subsample. The right panels show the result of the logrank (blue points) and Peto logrank (orange squares) tests performed on the parent populations (only measurements) vs. mock samples of the same size as the parent population, where a progressively larger number of values is flagged as censored data. The pvalue is shown as a function of the number of limits. In both panels, the upper axis indicates the percentage with respect to the total size of the sample (see Appendix D).