Heatmap showing the stacked two-dimensional PDF derived based on 120 000 galaxies with a redshift distribution sampled from our real data set and accounting for the uncertainties in both SFR and L_{150 MHz} as in Fig. 5. The median-likelihood estimate of the SFR-L_{150 MHz} relation is shown as the thick red line, while the recovered relation (in purple) is very close to the true SFR-L_{150 MHz} relation (dashed pink line). The colour bar to the right shows the effective number of galaxies in each bin.