\begin{table}%t1
\caption{Results for the scaling factors $\lambda_\parallel$ and 
$\lambda_\bot$ obtained from the dozen $256^3$~simulations.}
\label{tab:sf}
%\centering
\small
\begin{tabular}{c|cc|cc|cc}
\hline\hline
 & \multicolumn{2}{c|}{Real space} & \multicolumn{2}{c|}{Redshift space} & 
\multicolumn{2}{c}{Difference}\\
Parameter & \multicolumn{1}{c}{mean}   & \multicolumn{1}{c|}{sigma} & 
\multicolumn{1}{c}{mean}  & \multicolumn{1}{c|}{sigma}   &
 \multicolumn{1}{c}{mean} & \multicolumn{1}{c}{sigma}\\
\hline
$z=10$ & & & & & & \\
$\lambda_{||}$  &  $0.998$ & $0.007$  &  $0.998$ & $0.008$ &  $\phantom{-}0.000$ & $0.001$ \\
$\lambda_{\bot}$  &  $0.999$ & $0.005$  &  $0.999$ & $0.005$ &  $\phantom{-}0.000$ & $0.001$ \\
\hline
$z=3$ & & & & & & \\
$\lambda_{||}$  &  $0.998$ & $0.009$  &  $0.999$ & $0.011$ &  $-0.002$ & $0.004$ \\
$\lambda_{\bot}$  &  $1.000$ & $0.006$  &  $0.999$ & $0.006$ &  $\phantom{-}0.001$ & $0.002$ \\
\hline
$z=1$ & & & & & & \\
$\lambda_{||}$  &  $0.997$ & $0.010$  &  $0.999$ & $0.014$ &  $-0.003$ & $0.008$ \\
$\lambda_{\bot}$  &  $0.999$ & $0.009$  &  $0.999$ & $0.010$ &  $\phantom{-}0.000$ & $0.003$ \\
\hline
\end{tabular}
\end{table}