\begin{table}%t2
\caption{Different measurements of the errors for the perturbative and empirical
methods (for $N = 3$).}
\label{tab:error}
%\centering
\small
\begin{tabular}{*{5}{c}}
\hline
\hline
&&&& \\[-8pt]
& \multicolumn{2}{c}{Perturbative} &
\multicolumn{2}{c}{Asymptotic} \\
$\frac{\Omega}{\Omega_{K}}$ &
$\frac{\left< \mathcal{E}^2 \right>^{1/2}}{\Delta_n}$ &
$p$ &
$\frac{\left< \mathcal{E}^2 \right>^{1/2}}{\Delta_n}$ &
$p$ \\
&&&& \\[-8pt]
\hline
 0.037 & 0.0005 & 0.0000 & 0.0114 & 0.0000 \\ 
 0.111 & 0.0370 & 0.0054 & 0.0141 & 0.0044 \\ 
 0.186 & 0.1793 & 0.0294 & 0.0124 & 0.0022 \\ 
 0.262 & 0.4325 & 0.0595 & 0.0135 & 0.0047 \\ 
 0.339 & 0.7436 & 0.0826 & 0.0174 & 0.0041 \\ 
 0.419 & 0.9924 & 0.1073 & 0.0109 & 0.0013 \\ 
 0.502 & 1.0674 & 0.1237 & 0.0085 & 0.0025 \\ 
 0.589 & 0.9885 & 0.1497 & 0.0036 & 0.0035 \\ 
\hline
 0.589 & 0.3506 & 0.0319 & 0.1235 & 0.0059 \\ 
\hline
\end{tabular}
\end{table}