**Table 4:** A quantitative comparison of the spectroscopic features in high-z supernovae (as measured with EW and CaII H&K ejection velocities) and the mean trends exhibited for these quantities by local SNe Ia. These results show that there are no significant differences between distant SNLS objects and nearby SNe, with the exception of EW{MgII}.
Feature	Reduced^a	DOF^b	Prob^c
	$\chi ^2$
EW{CaII}	1.10	30	0.67
EW{SiII}	0.47	40	<0.002
EW{MgII}	1.86	44	>0.999
$v_{\rm {ej}}$	1.03	45	0.64

^a $\chi^2 /\rm d.o.f.$ calculated for the measurement/data set in question and the corresponding low-z mean trend;
^b Degrees of freedom used when calculating the reduced $\chi ^2$ , $N_{\rm {data points}}-1$ ;
^c Probability (0.00-1.00) that the null hypothesis, that the high-z data are consistent with the trend displayed by low-z SNe, can be rejected.

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