Distributions of various observables associated with the H I 21 cm absorption line and radio continuum associated with quasars (16) and radio galaxies (19). Different symbols and colors are used for systems with different radio SEDs: steep spectrum (S, filled blue circles), peaked spectrum (P, filled green diamonds) and flat spectrum (F, filled red triangles). In all the panels, the dotted lines mark the median. The location of J2339−5523, a steep-spectrum source, is shown using a five-point star.