Median values of the posterior distributions estimated for the percentiles 10%, 50%, and 90% and [M/H], compared to the true values. The R² score achieved for each prediction is 0.88, 0.97, 0.98, and 0.96, respectively. Each blue dot is a different sample from the test set. The red line shows the one-to-one relation, the histograms at the right of each panel show the marginal distributions of the predictions, and the histograms of the real data are shown at the top. Kernel density estimation contours are drawn in black at iso-proportions of the density of samples.