\begin{table}%t6
\caption{\label{table6}Dwarf-to-giant (D/G) ratios obtained from the OLFs.}


\small%\centerline
 {
\begin{tabular}{lcccc}
\hline\hline
Group & D/G$_{0.5}$ & D/G$_{0.5,17}$ & D/G$_{\rm WFI}$ & D/G$_{\rm WFI,17}$ \\
\hline
RR~143 & 1.3 $\pm$ 0.7 & 0.0 $\pm$ 0 & 1.9 $\pm$ 1.2 & 0.0 $\pm$ 0 \\
RR~210 & 4.2 $\pm$ 1.4 & 1.8 $\pm$ 0.7 & 3.9 $\pm$ 2.1 & 2.0 $\pm$ 1.2 \\
RR~216 & 3.0 $\pm$ 1.0 & 1.0 $\pm$ 0.4 & 8.0 $\pm$ 3.8 & 2.5 $\pm$ 1.4 \\
RR~242 & 3.4 $\pm$ 1.1 & 0.9 $\pm$ 0.4 & 4.3 $\pm$ 1.6 & 0.9 $\pm$ 0.5 \\
Combined X-ray bright & 2.2 $\pm$ 0.6 & 0.4 $\pm$ 0.2 & 3.0 $\pm$ 0.9 & 0.4 $\pm$ 0.2 \\
Combined X-ray faint & 3.5 $\pm$ 0.8  & 1.3 $\pm$ 0.4 & 5.8 $\pm$ 2.0 & 2.2 $\pm$ 0.9 \\
\hline
\end{tabular}}
\medskip
Column 2: D/G$_{0.5}$: dwarf-to-giant ratio for galaxies within 0.5~$h_{100}^{-1}$~Mpc;
Col.~3: D/G$_{0.5,17}$: dwarf-to-giant ratio for galaxies within 0.5~$h_{100}^{-1}$~Mpc using only
dwarfs brighter than $M_R = -17 +5 ~ \log h_{100}$;
Col.~4: D/G$_{\rm WFI}$: dwarf-to-giant ratio for galaxies within the WFI~field of view;
Col.~5: D/G$_{\rm WFI,17}$: dwarf-to-giant ratio for galaxies within the WFI~field of view using only dwarfs brighter than $M_R = -17 +5 ~ \log h_{100}$.
\end{table}