\begin{table}%t4
 \caption{\label{tab:chi2_results} A quantitative comparison of the
 spectroscopic features in high-$z$ supernovae (as measured with {\it 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 {\it EW}\{MgII\}.}
%\centerline
 {\begin{tabular}{lccc}
\hline \hline Feature & Reduced$^{{a}}$ & DOF$^{{b}}$ & Prob$^{{c}}$
\\ & $\chi^2$ & & \\ \hline {\it EW}\{CaII\} & 1.10 & 30 & 0.67 \\
{\it EW}\{SiII\} & 0.47 & 40 & $<$0.002 \\ {\it EW}\{MgII\} & 1.86 & 44 &
$>$0.999 \\ $v_{\rm{ej}}$ & 1.03 & 45 & 0.64 \\ \hline
\end{tabular}}
\par
\smallskip
\par
{\small
$^a$    $\chi^2 /\rm  d.o.f.$ calculated for the measurement/data set in question and the corresponding low-$z$ mean trend;
\\
$^b$    Degrees of freedom used when calculating the reduced $\chi^2$, 
\mbox{$N_{\rm{data points}}-1$};
\\
$^c$    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.  
}
\normalsize
\end{table}