\begin{table}%t4
\caption{\label{probs}The probability of obtaining a dispersion of 5.77~m/s on a set of 5 points characterized by dispersions in the range 5--10~m/s.}
%\centering
\par
\begin{tabular}{cc} 
\hline\hline\noalign{\smallskip}
$\sigma$ [m/s] &  $P$  [\%]  \\ 
 \hline 
 5   & 84.1  \\
6  & 66.3  \\
7  & 49.9   \\
8  & 36.6   \\
9  & 26.6   \\
10  & 19.5   \\
\hline 
\end{tabular}
\end{table}