Bolometric luminosity (left), Eddington ratio ε (middle), and accretion rate (right) as a function the black hole mass. Top: rWLQ sample (magenta frames: rWLQ-EWS subsample, filled red squares: FIRST-detected, open red squares: FIRST undetected) and comparison sample (CS; contours). Second row: high-luminosity subsample (blue symbols) from a simulated quasar sample (contours). Third row: The subsample of comparison quasars with W_{Mg ii}< 15 Å and W_{C iv}< 7 Å (black symbols) compared with the entire comparison sample (contours). Bottom: quasars with high-S/N spectra (magenta symbols) from the comparison sample compared with the entire comparison sample (contours).