Histograms of the distributions of various parameters in the OPARG and OPIRG samples: the radio luminosity L_1.4, the total stellar mass M_⋆, the black hole mass M_BH, the galaxy concentration index CI, the galaxy flatness parameter b/a, the stellar extinction A_V, and the mean stellar age, t_L. OPARGs are shown in blue and OPIRGs in red; darker lines represent density histograms with the completeness correction, and lighter lines represent density histograms without it. The segments at the top of each panel show the 16–84 percentiles of each distribution, with the dot marking the median.