Internal precision of our CNN results for the inner observed set with S/N ≥ 30 (light blue), with S/N < 30 (dark blue) and the outer observed set (red). The left panels show the internal precision relative to the absolute CNN label values, the right panels show the precision relative to the spectra S/N. The boxplots in the right panels show the median and spread of the uncertainties of the whole observed set, in S/N bins of width 10, starting at S/N = 10.