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We apply the Standardized Candle Method (SCM) for Type II Plateau supernovae(SNe II-P), which relates the velocity of the ejecta of a SN to its luminosityduring the plateau, to 15 SNe II-P discovered over the three season run of theSloan Digital Sky Survey - II Supernova Survey. The redshifts of these SNe -0.027 < z < 0.144 - cover a range hitherto sparsely sampled in the literature;in particular, our SNe II-P sample contains nearly as many SNe in the Hubbleflow (z > 0.01) as all of the current literature on the SCM combined. We findthat the SDSS SNe have a very small intrinsic I-band dispersion (0.22 mag),which can be attributed to selection effects. When the SCM is applied to thecombined SDSS-plus-literature set of SNe II-P, the dispersion increases to 0.29mag, larger than the scatter for either set of SNe separately. We show that thestandardization cannot be further improved by eliminating SNe with positiveplateau decline rates, as proposed in Poznanski et al. (2009). We thoroughlyexamine all potential systematic effects and conclude that for the SCM to beuseful for cosmology, the methods currently used to determine the Fe IIvelocity at day 50 must be improved, and spectral templates able to encompassthe intrinsic variations of Type II-P SNe will be needed.

Type II-P Supernovae from the SDSS-II Supernova Survey and the Standardized Candle Method