These correlation studies show ΔpEW, the measured pEW minus the expected pEW (for the corresponding epoch for the full sample of normal SNe Ia), vs. MLCS2k2 lightcurve parameter (Δ, A_V) for different epoch intervals. These are given above each panel. The Spearman correlation coefficient is given in each plot. The epoch ranges were chosen to correspond to those used in Fig. 12. For the post lightcurve peak epoch range (0−8) we include correlations with both Δ and A_V.