\begin{table}%t3
\caption{\label{ks}Significance levels (\%) of the Kolmogorov-Smirnov test for
NGC 6822 and the Magellanic Clouds.}  
%\centerline
{\begin{tabular}{l c c c }
\hline\hline
 & Group I $^{{\rm }}$& Group II & Group I+II \\
 & $U_{R}$ & $U_{R}$  & $U_{R}$    \\
\hline
NGC 6822 & 72.7 & 72.9 & 26.2 \\
LMC      & 49.7 & 64.3 &  0.2 \\
SMC      & 48.5 & 72.5 &  2.1 \\
\hline
\end{tabular}}
\medskip
\par
Column~1: Galaxy. Columns~2--4:
Significance levels for the different pairs of size ranges.
\end{table}