

\begin{longtable}{|r|r|r|r|}\hline
   \multicolumn{4}{|c|}{Extreme Observations}\\\hline
   \multicolumn{2}{|c|}{Lowest} &    \multicolumn{2}{|c|}{Highest}\\\hline
   Value &    Obs &    Value &    Obs\\\hline
\endhead
   4.9 &    7 &    6.3 &    9\\\hline
   4.9 &    2 &    6.4 &    8\\\hline
   5.0 &    4 &    7.0 &    6\\\hline
   5.0 &    1 &    7.2 &    5\\\hline
   5.9 &    3 &    7.3 &    10\\\hline
\end{longtable}

