Results of the numerical experiment of the synthesis and inversion of Stokes profiles. The level noise added is σ = 10^-3. Solid-black lines indicate the original distributions employed in the synthesis of 2 × 10⁶ Stokes profiles (Eq. (3)). Dashed lines show the distributions obtained employing only the Stokes profiles that are selected with the S/R_quv-criterion. The red lines display the distributions obtained from the inversion of the selected profiles: a) the absolute value of the component of the magnetic field vector that is parallel to the observer’s line-of-sight |B_∥| = |Bcosγ|; b) the component of the magnetic field vector that is perpendicular to the observer’s line-of-sight B_⊥ = Bsinγ; c) the magnetic field strength or module of the magnetic field vector B; d) the inclination of the magnetic field vector with respect to the observer’s line-of-sight γ; e) the azimuthal angle of the magnetic field vector on the plane that is perpendicular to the observer’s line-of-sight φ; f) the magnetic filling factor α. In all panels, the dashed-black and solid-red curves are normalized to the quotient of the number of profiles selected with each particular criteria to the total number of profiles synthesized (2 × 10⁶).