MDF for the 1339 metallicity measurements of RGB members of the Sculptor dSph (blue). The vertical dotted red line is the mean, [Fe/H]=−1.82, as determined by a Gaussian fit to the distribution (dashed red line). The black-outlined histogram is corrected for the incompleteness at different elliptical radii, as given in Fig. 14. The mean metallicity shifts by about 0.1 dex (dotted black line) to [Fe/H] = − 1.73, according to the Gaussian fit (dashed black line).