Predicted M_•-M_Bulge diagram and its projections for a type 1 AGN sample, with luminosity limit of l_min = 47 (as the right panel of Fig. 3). For the black hole masses an uncertainty of 0.3 dex is assumed, representing the intrinsic uncertainty in the virial method. A thick solid line shows the observed M_•-M_Bulgerelation for the observed M_•, which is identical to the relation without uncertainty in the virial mass. Only the scatter in the relation is increased. The red dashed dotted line shows the mean relation  ⟨ s ⟩ (μ_o), while the dotted red line gives the mean relation  ⟨ s ⟩ (μ), i.e. without measurement uncertainty in the black hole mass.