Fig. 12.
Mean values of the IFP for SDSS QSOs at 3.6 ≤ z ≤ 4.6 and I ≤ 20.0 (option 1), divided into redshift for three bins of absolute magnitude M1450. The vertical bars are the standard error of the mean in each bin of absolute magnitude. The continuous lines show the best power-law fit to the observed mean points for each M1450 bin.
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