Corrected deviations Σ(λ_i, mc)^i, mc and Σ(σ_i, mc)^Corr for the Hα (top) and [NII] (bottom) lines derived by applying the same mean dispersion factor ( Å; see also Fig. 5) for the wavelength and the velocity dispersion. In this correction the dispersion generated from using different stellar-subtraction methods and line-fitting cases is included. The error bars are now ≲1 Å for all spectra and for both parameters (shaded light red and cyan areas for the Hα and [NII] lines, respectively). The mean corrected deviations are represented by dashed white lines for both lines.