FIR/radio ratio, q₂₄, as a function of the X-ray luminosity for three groups of X-ray AGN: > 5 sigma VLA detections (black), 3−5 sigma VLA detections (blue), and radio-undetected (red); the normalized frequency distributions appear at the right. The gray bar represents the range of q₂₄ between redshifts of 0 ≤ z ≤ 3 for five star-forming galaxy templates (data acquired from Del Moro et al. 2013).