Trends between the C IV shape parameter (FWHM/σ_l) and the coadded–SE line dispersion differences. The top panel compares the SE C IV line shape measurements to those measured from the coadded spectra; colors represent different S/N subsamples and are the same as in Figure 10. The middle panel is the same as the top panel, except the color coding now reflects the division of objects into two populations: the black (red) points represent objects for which the SE shape is (is not) roughly consistent with the coadded shape. The black points are defined by objects within the 1σ scatter of having the same shape (black solid line), where 1σ is defined from only points below this relation. All other objects are shown in red. The bottom panel is the same as the bottom right panel of Figure 10 but uses the same color coding as the middle panel.