2−10 keV luminosity versus the 12 μm luminosity, both on logarithmic scale for PG QSOs, S1s and S2s a), SBs b), AGN-dominated LINERs c) and SB-dominated LINERs d). The continuous red and dashed-green lines show the best fit correlations for AGN and SBs, respectively, reported by Asmus et al. (2011). The typical error for these measurements is shown as a cross in the top left corner of panel c). Errors for the X-ray luminosity are estimated as 10% of its value. The dot-dashed blue line and long-dashed light green line show the linear fit for PG QSOs, S1s, and S2s and for SBs, respectively. Grey arrows mark objects with reported upper limits on the X-ray luminosity.