Same as Fig. 4 for ALPINE sources, but adopting conservative upper limits for the [C II] non-detections (two times the agressive 3σ upper limits). The Bayesian linear fit to all the measurements (detections and upper limits) is shown by the dark green lines/band, which also illustrates the probability distribution of the fit. The fit yields a slope of 0.96 ± 0.09, compatible with unity, and a small but insignificant offset (by ∼ − 0.03 dex) with respect to the local relation.