Metallicity distribution function and the distribution of the metallicity uncertainties (top), and the same for effective temperature (bottom). The means of the individual posteriors were used to construct the histogram on the left side. The right side histograms show the standard deviations of the posteriors. The light gray histograms include all candidate stars, and the dark gray histograms include all cases with a 50% probability for the computed metallicity to be at least below [Fe/H] = −2 dex.