\begin{table}%t2
\caption {\label{parametry-T90-chyby}The minimal $\chi^2$, corresponding goodness-of-fits
and F-tests for fitted two and three log-normal functions
on the RHESSI GRB~$T_{90}$ distribution for ten different changes of durations
by their uncertainties.}
%\centering
\par
\begin{tabular}{rrrrr}
\hline
\hline
%\\[-2ex]
               &  2 log-normal  &                 &  3 log-normal  &  F-test             \\[0.3ex]
%\\[-2ex]
\hline
%\\[-2ex]
$\chi^2$       &  goodness      &  $\chi^2$       &  goodness      &  $P(F>F_{0})$       \\[0.3ex]
               &    [\%]        &                 &     [\%]       &     [\%]            \\[0.3ex]
%\\[-2ex]
\hline 
\\[-2ex]
   23.97       &     4.6        &    14.19        &    22.3        &   11.1              \\[0.3ex]
   18.03       &    20.6        &    10.65        &    47.3        &   11.0              \\[0.3ex]
   15.99       &    31.4        &     5.13        &    92.5        &    0.5              \\[0.3ex]
   13.52       &    48.6        &     7.50        &    75.8        &    8.0              \\[0.3ex]
   17.87       &    21.3        &     7.55        &    75.3        &    2.0              \\[0.3ex]
   16.36       &    29.2        &     9.66        &    56.1        &   11.0              \\[0.3ex]
   11.89       &    61.5        &     6.95        &    80.3        &   10.4              \\[0.3ex]
   21.86       &     8.2        &    13.77        &    24.6        &   15.1              \\[0.3ex]
   20.07       &    12.8        &     9.49        &    57.7        &    3.5              \\[0.3ex]
   20.40       &    11.8        &    12.73        &    31.1        &   14.4              \\
\hline
\end{tabular}
\end{table}