Comparison of the dynamical mass estimated on projected groups with different levels of incompleteness. The three panels correspond to the different real mass bins chosen in Fig. 7. The black histogram is the reference set of real groups and the blue histogram is the set of complete projected groups. The histograms in green, orange and red represents projected groups that are only complete down to 0.3 M_⊙, 0.5 M_⊙ and 1 M_⊙ respectively. The figure shows the results using the 90% Lagrangian radii.