Eddington ratio vs. black hole mass for the targeted sample. The data points for the QSO MUSEUM III sample (same symbols as in Figure 2) are compared with the values for SDSS quasars in the same redshift range (blue, 2-D number density histogram; Rakshit et al. 2020). The contours indicate the iso-proportions of the density at 0.2, 0.4, 0.68 and 0.95 levels, indicating that 20%, 40%, 68%, and 95% of the quasars are outside that contour, respectively.