\begin{table}%t5
%\centering
\par
\caption{\label{tab:host_hiz} Comparison of SNe Ia spectral features in different host types at
low and high-$z$.  The values given are the mean and error in the mean of the 
residuals from the low-$z$ trend.}
\begin{tabular}{lcc}
\hline \hline
Feature   & \multicolumn{2}{c}{SNe Measurement (low-$z$ trend subtracted)} \\
          &     E/S0        &   Spiral        \\
\hline
Low-$z$ \\ 
\hline
\noalign{\smallskip}
{\it EW}\{CaII\} --  \AA &  $-1.7\pm 4.7$           & $-2.0\pm  3.2$ \\
{\it EW}\{SiII\} -- \AA &  $ 5.1\pm 0.7$           & $-4.5\pm  0.9$ \\
{\it EW}\{MgII\} -- \AA &  $-0.6\pm 3.8$           & $ -0.7\pm  2.9$ \\
$v_{\rm{ej}}$ -- 1000 km~s$^{-1}$   &  $ -0.18\pm 0.23$   & $ 0.17\pm  0.27$  \\
\hline
High-$z$ \\
\hline
\noalign{\smallskip}
{\it EW}\{CaII\} -- \AA &  $-13.0\pm 16.0 $        &  $-0.8\pm  7.2$ \\
{\it EW}\{SiII\} -- \AA &  $ 5.0\pm 2.4 $          &  $-1.4\pm  1.1$ \\
{\it EW}\{MgII\} -- \AA &  $29.1\pm 9.5$           &  $ 0.1\pm  7.7$ \\
$v_{\rm{ej}}$ -- 1000 km~s$^{-1}$  &  $ -0.13\pm 0.90$   & $ 0.55\pm  0.50$ \\
\hline
\end{tabular}
\end{table}