Distributions of the derived stellar parameters (black solid histogram), and the lower and upper limits of the confidence intervals (dotted-dashed red histogram and thick dashed green histogram, respectively) as computed in Sect. 7.6 for 100 Monte Carlo realizations of the synthetic spectrum with T_eff = 4538 K, log g = 2.42, [Fe/H] = 0.30 dex, S/N = 100, and R = 12 000. The black point represents the median of the derived stellar parameters while the errorbars show the lower and upper limit of the interval that holds the 68% of the measurements. The vertical dashed lines represent the reference values.