Relative differences in the inferred most likely initial mass (left panels) and age (right panels) when taking correlations into account. In the top panels a) and b) we show the relative differences for stars with known effective temperatures and luminosities, in the middle panels c) and d) for stars with known effective temperatures and surface gravities, and in the bottom panels e) and f) for stars with known effective temperatures, luminosities, and surface gravities. The differences are defined with respect to the most likely parameters when neglecting correlations, i.e. (x_corr−x_no−corr) /σ_no−corr where x is the parameter and σ the 1σ uncertainty. The indices “corr” and “no-corr” show that correlations have been taken into account and neglected, respectively. The different ranges in the relative differences in each panel should be noted.