\begin{table}%t4
%\centering
\par
\caption {\label{tests}Results of the K-S and R-S tests on different
subsets of \mbox{systems}.}
\begin{tabular}{@{}ccccc}
\hline\hline
\noalign{\smallskip}
Sub-sample & $D$ & Pr$(D)$ & $Z$ & Pr$(Z)$\\
\hline
\multicolumn{5}{c}{Eccentricity distribution} \\
1 vs. 2     & 0.435 & 0.002 & 3.142  & 0.001 \\
1 vs. 4       & 0.50  & 0.08  & 2.18   & 0.01  \\
1 vs. 3+4     & 0.449 & 0.001 & 3.4535 & 0.0003 \\
2 vs. 4       & 0.32  & 0.64  & 0.73   & 0.23  \\
2 vs. 3+4     & 0.21  & 0.65  & 0.24   & 0.41  \\
\hline
\multicolumn{5}{c}{Metallicity distribution} \\
1 vs. 2      & 0.22  & 0.27  & --0.67  & 0.25  \\
1 vs. 4      & 0.46  & 0.06  & --1.57  & 0.06  \\
1 vs. 3+4    & 0.389 & 0.002 & --2.745 & 0.007 \\
2 vs. 4      & 0.31  & 0.51  & --1.11  & 0.13   \\
2 vs. 3+4    & 0.28  & 0.23  & --1.36  & 0.09  \\
\hline
\end{tabular} 
\tablefoot{All planets from the~\citealt{butler06} catalog with
$M_{\rm c}\sin i < 4$ $M_{\rm J}$
(1), companions with $4 < M_{\rm c}\sin i < 10$ $M_{\rm J}$ (2), companions with $10 <
M_{\rm c}\sin i < 80$ $M_{\rm J}$
but excluding those with confirmed mass higher than~80 $M_{\rm J}$ (3),
and companions with true masses in the range $10 < M_{\rm c} < 80$ $M_{\rm J}$ (4).}
\end{table}