Distribution of median flux density against redshift (i and ii), median flux density and F_var against synchrotron peak frequency (iii–vi), and median flux density and F_var against radio variability Doppler factor (vii–x) in ZTF-only merged light curves of the sources in the CAZ catalog. Pink crosses and solid markings refer to FSRQs (Q); blue dots and dotted markings refer to BLLs (B). The top panels are scatter plots (with y-axis in logarithmic scales), where the binned running average is represented using lines (solid for FSRQs and dotted for BLLs). Kendall’s τ correlation coefficient and significance are reported for FSRQs and BLLs. In the bottom panels, we show the binned box plots of each scatter plot. The averages and box plots are both only shown for bins with at least ten data points. In the top panels we show all data points, while in the bottom panels we zoom in on the boxes.