Relationships between CF and L_IR (upper panel a) and L_agn (lower panel b), including only the sources with S/N_W3 & W4 > 5. The blue circles indicate low-z quasars, and the green and red diamonds indicate high-z sources. The orange circles and red diamonds indicate low-z and high-z quasars with the Spitzer M24 data. Additionally, the median statistics were calculated for the samples, as described in the legend in the lower left corner. The error bars represent the MAD errors.