\begin{table}%t5
\caption{\label{spearman-tests}Spearman rank test results for early-type fraction versus cluster velocity dispersion.}
%\centering
\small
\begin{tabular}{lrrr}
\hline\hline \noalign{\smallskip}
Cluster sample & $N_{\rm cl}$ & $R_{\rm s}$ & $p$-value\\
 (1) & (2) & (3) & (4)\\
\hline
SDSS &158 & $-$0.05 & 0.51\\
EDisCS all & 18 & 0.18 & 0.47\\
EDisCS mid-$z$ & 9 & $-$0.11 & 0.78\\
EDisCS high-$z$ & 9 & 0.73 & 0.025\\
\hline
\end{tabular}
\end{table}