\begin{table}%T3
\caption{\label{tb:comS1}A general comparison of the mock catalogues and samples from S84.}
%\centerline
 {
\begin{tabular}{lccccccc}
  \hline
  \hline
  Sample & $n_{\rm G}$ & $n_{+ \Delta z}$ & $n_{- \Delta z}$ & $n_{\pm \Delta z}$ &
  $+ \Delta z$ (\%) & $- \Delta z$ (\%) & $\pm \Delta z$ (\%)
  \\
  \hline 
  S84, all groups ($n \leq 10$) & 85 & 42 & 32 & 11 & 57.0 & 43.0 & 12.9\\ 
  S84, E/S0 dominant groups removed & 60 & 33 & 18 & 9 & 65.0 & 35.0 & 15.0\\
  S84, E/S0 dominant groups & 21 & 9 & 10 & 2 & 47.0 & 53.0 & 9.5\\
  \hline
  Mock1, all groups ($n \leq 10$) & 1384 & 622 & 505 & 257 & 55.2 $\pm$ 5.1 &
  44.8 $\pm$ 5.1 & 18.6 $\pm$ 1.9\\
  Mock1, spiral ($T \geq 0.92$) dominant groups & 1153 & 528 & 408 & 217 & 56.4 $\pm$
  5.6 & 43.6 $\pm$ 5.6 & 18.8 $\pm$ 2.4\\
  Mock1, E/S0 ($T < 0.92$) dominant groups & 231 & 94 & 97 & 40 & 49.2 $\pm$ 6.9
  & 50.8 $\pm$ 6.9 & 17.3 $\pm$ 4.2\\
  \hline
  Mock2, all groups ($n \leq 10$) & 12~100 & 5087 & 4658 & 2355 & 52.2 $\pm$ 1.3
  & 47.8 $\pm$ 1.3 & 19.5 $\pm$ 0.6\\
  Mock2, spiral ($T \geq 0.92$) dominant groups & 9086 & 3854 & 3466 & 1748 & 52.5
  $\pm$ 1.8 & 47.3 $\pm$ 1.6 & 19.2 $\pm$ 0.8\\
  Mock2, E/S0 ($T < 0.92$) dominant groups & 3013 & 1179 & 1227 & 607 & 49.0
  $\pm$ 1.8 & 51.0 $\pm$ 1.8 & 20.1 $\pm$ 2.0\\
  \hline
\end{tabular}}
\medskip 
\par
Note: Sample refers either to S84, Mock1 or Mock2 catalogues, $n_{\rm G}$ is the
number of groups, $n_{+ \Delta z}$ is the number of groups with positive redshift
excess, $n_{- \Delta z}$ is the number of groups with negative redshift excess,
$n_{\pm \Delta z}$ is the number of groups with no excess, $+ \Delta z$ is the
percentage of groups with positive redshift excess when ties have been removed, $-
\Delta z$ is the percentage of groups with negative redshift excess when ties have
been removed and $\pm \Delta z$ is the percentage of groups having equal number
of negative and positive redshifts. Errors for mock catalogues are standard
deviation errors between five different observation points.
\end{table}