\begin{table}%t12
 %\centering
\par
 \caption {\label{t15}As table~\ref{t8} for the $z$ and $A_{\rm v}$ parameters 
for galaxy spectra that include redshift and reddening.}
\small
 \begin{tabular}{l c c c}          
 \hline\hline                        
  Astrophysical parameter                & mean(real-predicted)/mean(real) & sd(real-predicted)/mean(real) & SVs   \\
 \hline
 $z $                                    & 0.012                           & 0.190                         & 7291  \\
 $A_{\rm v}$                                   & 0.002                           & 0.100                         & 5478  \\
\hline
\end{tabular}
\end{table}