Normalized histogram of stretch parameter measured in r (left) and g (right panels) bands. A kernel density estimate using a Gaussian kernel, which shows an estimate of the continuous density, has been over-plotted as a line of matching color. Each measurement is also indicated with a tick mark. All values have been corrected to the space of top: Type Ibc r-band template stretch values by deriving a stretch correction factor to the Type Ibc r-band template by fitting the other templates (see text). Stretch = 1.65 is marked with a gray dashed-line. Plotted normalized with respect to the total counts and bin width. Results from Appendix B have been added to construct the same for middle: Type IIb SNe, bottom: combined Type Ibc and IIb SNe.