

\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
   3.0 &    33 &    4.5 &    37\\\hline
   3.9 &    40 &    5.0 &    34\\\hline
   4.0 &    36 &    5.2 &    31\\\hline
   4.4 &    39 &    5.8 &    35\\\hline
   4.4 &    38 &    7.8 &    32\\\hline
\end{longtable}

