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Next to typesetting mathematics, typesetting tables is probably one of the
more difficult aspects of LaTeX. However, basic tables are remarkably easy to
do (see Table \ref{Tab1}). Tables are centered on the page using the
{\tt centering} command (see Table \ref{Tab2}); though blank rows can be
inserted to improve readability, a much better mechanism is to use
horizontal bars to separate columns (see Tables \ref{Tab3} and \ref{Tab4}) and, 
if necessary, vertical bars to separate columns (see Table \ref{Tab5}). 
Text spanning multiple columns is easy to do using the <tt>multicolumn</tt>
command but must be done carefully (and may also require use use of the 
{\tt cline} command) (see Tables \ref{Tab6} and \ref{Tab7}). The 
final icing on the cake is to get even-width columns using ``blank'' lines with 
embedded {\tt hspace*} command (see Table \ref{Tab8}).

\begin{table}[t]
%
\begin{tabular}{l r r r r c}
Observed    & Very  & Moderately & Sparse &      &       \\
Populations & Hairy & Hairy      & Hair   & Bald & Total \\
Men         & 12    & 54         & 22     & 6    & 94  \\
Women       & 31    & 42         & 7      & 0    & 80  \\
Bears       & 6     & 0          & 0      & 1    & 7   \\
Total       & 43    & 96         & 29     & 7    & 171 \\
\end{tabular}
%
\caption{Results of Study Five (Version 1).}
%
\label{Tab1}
\end{table}

\begin{table}[t]
%
\centering
\begin{tabular}{l r r r r c}
Observed    & Very  & Moderately & Sparse &      &       \\
Populations & Hairy & Hairy      & Hair   & Bald & Total \\
Men         & 12    & 54         & 22     & 6    & 94  \\
Women       & 31    & 42         & 7      & 0    & 80  \\
Bears       & 6     & 0          & 0      & 1    & 7   \\
Total       & 43    & 96         & 29     & 7    & 171 \\
\end{tabular}
%
\caption{Results of Study Five (Version 2).}
%
\label{Tab2}
\end{table}

\begin{table}[b]
%
\centering
\begin{tabular}{l r r r r c}
Observed    & Very  & Moderately & Sparse &      &       \\
Populations & Hairy & Hairy      & Hair   & Bald & Total \\
\hline
Men         & 12    & 54         & 22     & 6    & 94  \\
Women       & 31    & 42         & 7      & 0    & 80  \\
Bears       & 6     & 0          & 0      & 1    & 7   \\
\hline
Total       & 43    & 96         & 29     & 7    & 171 \\
\end{tabular}
%
\caption{Results of Study Five (Version 3).}
%
\label{Tab3}
\end{table}

\begin{table}[t]
%
\centering
\begin{tabular}{l r r r r c}
Observed    & Very  & Moderately & Sparse &      &       \\
Populations & Hairy & Hairy      & Hair   & Bald & Total \\
\hline\hline
Men         & 12    & 54         & 22     & 6    & 94  \\
\hline
Women       & 31    & 42         & 7      & 0    & 80  \\
\hline
Bears       & 6     & 0          & 0      & 1    & 7   \\
\hline \hline
Total       & 43    & 96         & 29     & 7    & 171 \\
\end{tabular}
%
\caption{Results of Study Five (Version 4).}
%
\label{Tab4}
\end{table}

\begin{table}[t]
%
\centering
\begin{tabular}{| l || r | r | r | r || c |}
\hline
Observed    & Very  & Moderately & Sparse &      &       \\
Populations & Hairy & Hairy      & Hair   & Bald & Total \\
\hline\hline
Men         & 12    & 54         & 22     & 6    & 94  \\
\hline
Women       & 31    & 42         & 7      & 0    & 80  \\
\hline
Bears       & 6     & 0          & 0      & 1    & 7   \\
\hline \hline
Total       & 43    & 96         & 29     & 7    & 171 \\
\hline
\end{tabular}
%
\caption{Results of Study Five (Version 5).}
%
\label{Tab5}
\end{table}

\begin{table}[t]
%
\centering
\begin{tabular}{| l || r | r | r | r || c |}
\hline
            & \multicolumn{4}{c}{Hair Characteristics} & \\
Observed    & Very  & Moderately & Sparse &      &       \\
Populations & Hairy & Hairy      & Hair   & Bald & Total \\
\hline\hline
Men         & 12    & 54         & 22     & 6    & 94  \\
\hline
Women       & 31    & 42         & 7      & 0    & 80  \\
\hline
Bears       & 6     & 0          & 0      & 1    & 7   \\
\hline \hline
Total       & 43    & 96         & 29     & 7    & 171 \\
\hline
\end{tabular}
%
\caption{Results of Study Five (Version 6).}
%
\label{Tab6}
\end{table}

\begin{table}[t]
%
\centering
\begin{tabular}{| l || r | r | r | r || c |}
\hline
            & \multicolumn{4}{c ||}{Hair Characteristics} & \\
\cline{2-5}
Observed    & Very  & Moderately & Sparse &      &       \\
Populations & Hairy & Hairy      & Hair   & Bald & Total \\
\hline\hline
Men         & 12    & 54         & 22     & 6    & 94  \\
\hline
Women       & 31    & 42         & 7      & 0    & 80  \\
\hline
Bears       & 6     & 0          & 0      & 1    & 7   \\
\hline \hline
Total       & 43    & 96         & 29     & 7    & 171 \\
\hline
\end{tabular}
%
\caption{Results of Study Five (Version 7).}
%
\label{Tab7}
\end{table}

\begin{table}[p]
%
\centering
\begin{tabular}{| l || r | r | r | r || c |}
\hline
            & \multicolumn{4}{c ||}{Hair Characteristics} & \\
\cline{2-5}
Observed    & Very  & Moderately & Sparse &      &       \\
Populations & Hairy & Hairy      & Hair   & Bald & Total \\
\hline\hline
            & \hspace*{0.8in}
            & \hspace*{0.8in}
            & \hspace*{0.8in}
            & \hspace*{0.8in}
            & \\
Men         & 12    & 54         & 22     & 6    & 94  \\
 & & & & & \\
\hline
 & & & & & \\
Women       & 31    & 42         & 7      & 0    & 80  \\
 & & & & & \\
\hline
 & & & & & \\
Bears       & 6     & 0          & 0      & 1    & 7   \\
 & & & & & \\
\hline \hline
 & & & & & \\
Total       & 43    & 96         & 29     & 7    & 171 \\
 & & & & & \\
\hline
\end{tabular}
%
\caption{Results of Study Five (Version 8).}
%
\label{Tab8}
\end{table}

\end{document}