Same as Fig. 8, but with measurement uncertainty of 0.2 dex in the spheroid mass and no uncertainty in the black hole mass. The thick solid line shows the M_•-M_Bulgerelation for the observed M_Bulge values, while the dotted line shows the same relation but for the true M_Bulge, i.e. for the case of no measurement uncertainty. The sample bias is not affected, but the slope of the M_•-M_Bulgerelation flattens due to uncertainties in M_Bulge. The red dashed-dotted line shows again the mean relation  ⟨ s_o ⟩ (μ), which is not affected by uncertainties in M_Bulge.