Results of the MCMC analysis investigating the intrinsic scatter in the observed data across the VMP (pink) and EMP (purple) regime. The top row shows the posterior distributions of the central [X/Fe] values in order of their atomic number (C, O, and Si). The bottom row shows the associated distributions of the intrinsic scatter. In the middle column we show in gray the same analysis of the intrinsic scatter associated with the VMP stellar data included in Figure 3.