Distribution of S/N of SE spectra (black) and coadded spectra (red) for our sample of 482 SDSS-RM quasars. The coadded S/N is measured per angstrom in an emission-line-free continuum window near rest frame 1700 Å of each coadded spectrum, and the SE S/N shown is the median of the distribution of S/N measurements made similarly from all good SE spectra for each object. The ﹩{\sigma }_{{\rm{SE}}}﹩ error bar in the upper right corner represents the median of the distribution of scatter measurements made from the SE S/N distributions for all objects. Five coadded spectra have S/N > 115.