\begin{table}%t5
\caption{Fraction (in \%) of the number of \hii~regions for each galaxy with   $\rm\sigma_{nt}<13$~\kms\ and $\rm\sigma_{nt}>13$~\kms\ and the mean value of the relative errors in the velocity dispersion of the central components for these two groups of \hii~regions.}
\label{errLsigma}
%\centering
\par
\begin{tabular}{ccccc}
\hline
\hline
& \multicolumn{2}{c}{\hii\ regions with $\rm\sigma_{nt}>13$~\kms} 
& \multicolumn{2}{c}{\hii\ regions with $\rm\sigma_{nt}<13$~\kms} \\
    Galaxy   & Fraction & $\Delta\rm\sigma_{nt}$ & Fraction & $\Delta\rm\sigma_{nt}$ \\
\hline 
    NGC~1530 & 88.2\% & 4.1\% & 11.8\% & 32.1\% \\
    NGC~3359 & 54.4\% & 4.6\% & 45.6\% & 24.9\% \\
    NGC~6951 & 48.4\% & 3.8\% & 51.6\% & 27.8\% \\
\hline
\end{tabular}
\end{table}