\documentclass[11pt]{amsart}
\usepackage{geometry}                % See geometry.pdf to learn the layout options. There are lots.
\geometry{letterpaper}                   % ... or a4paper or a5paper or ... 
\usepackage{rotating}
%\geometry{landscape}                % Activate for for rotated page geometry
%\usepackage[parfill]{parskip}    % Activate to begin paragraphs with an empty line rather than an indent
\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{epstopdf}
\DeclareGraphicsRule{.tif}{png}{.png}{`convert #1 `dirname #1`/`basename #1 .tif`.png}

\title{COMBO}
\author{The Author}
%\date{}                                           % Activate to display a given date or no date

\begin{document}
\maketitle
\section{Scale Up Study}
%\subsection{}
\parbox{0.6in}{xalan2.7\\jedit4.2\\xerces1.4\\lucene2.4\\velocity1.6 (defects)}
\begin{tabular}{|r|r|rr|}
\multicolumn{4}{l}{} \\\cline{3-4}
\multicolumn{2}{c|}{~} & \multicolumn{2}{c|}{treated}\\\hline
percentile & raw & global & local\\\hline
0.00 & 0.00 & 0.00 & 0.00 \\
0.25 & 0.00 & 0.00 & 0.00 \\
0.50 & 1.61 & 0.00 & 1.61 \\
0.75 & 3.23 & 0.00 & 1.61 \\
1.00 & 100.00 & 16.13 & 12.90 \\ \hline
75th-25th & 3.23 & 0.00 & 1.61 \\ \hline
\end{tabular}
\begin{tabular}{r@{~=~}l}
min&0\\
max&100\\
num datums & 2433\\
\end{tabular}

\parbox{0.6in}{xalan2.7\\jedit4.2\\xerces1.4\\lucene2.4 (defects)}
\begin{tabular}{|r|r|rr|}
\multicolumn{4}{l}{} \\\cline{3-4}
\multicolumn{2}{c|}{~} & \multicolumn{2}{c|}{treated}\\\hline
percentile & raw & global & local\\\hline
0.00 & 0.00 & 0.00 & 0.00 \\
0.25 & 0.00 & 0.00 & 0.00 \\
0.50 & 1.61 & 0.00 & 1.61 \\
0.75 & 3.23 & 0.00 & 1.61 \\
1.00 & 100.00 & 16.13 & 14.52 \\ \hline
75th-25th & 3.23 & 0.00 & 1.61 \\ \hline
\end{tabular}
\begin{tabular}{r@{~=~}l}
min&0\\
max&100\\
num datums & 2204\\
\end{tabular}

\parbox{0.6in}{xalan2.7\\jedit4.2\\xerces1.4 (defects)}
\begin{tabular}{|r|r|rr|}
\multicolumn{4}{l}{} \\\cline{3-4}
\multicolumn{2}{c|}{~} & \multicolumn{2}{c|}{treated}\\\hline
percentile & raw & global & local\\\hline
0.00 & 0.00 & 0.00 & 0.00 \\
0.25 & 0.00 & 0.00 & 0.00 \\
0.50 & 1.61 & 0.00 & 1.61 \\
0.75 & 3.23 & 0.00 & 1.61 \\
1.00 & 100.00 & 16.13 & 19.35 \\ \hline
75th-25th & 3.23 & 0.00 & 1.61 \\ \hline
\end{tabular}
\begin{tabular}{r@{~=~}l}
min&0\\
max&100\\
num datums & 1864\\
\end{tabular}

\parbox{0.6in}{xalan2.7\\xerces1.4 (defects)}
\begin{tabular}{|r|r|rr|}
\multicolumn{4}{l}{} \\\cline{3-4}
\multicolumn{2}{c|}{~} & \multicolumn{2}{c|}{treated}\\\hline
percentile & raw & global & local\\\hline
0.00 & 0.00 & 0.00 & 0.00 \\
0.25 & 1.61 & 1.61 & 1.61 \\
0.50 & 1.61 & 1.61 & 1.61 \\
0.75 & 3.23 & 3.23 & 1.61 \\
1.00 & 100.00 & 100.00 & 25.81 \\ \hline
75th-25th & 1.61 & 1.61 & 0.00 \\ \hline
\end{tabular}
\begin{tabular}{r@{~=~}l}
min&0\\
max&100\\
num datums & 1497\\
\end{tabular}

\parbox{0.6in}{jedit4.2\\xalan2.7 (defects)}
\begin{tabular}{|r|r|rr|}
\multicolumn{4}{l}{} \\\cline{3-4}
\multicolumn{2}{c|}{~} & \multicolumn{2}{c|}{treated}\\\hline
percentile & raw & global & local\\\hline
0.00 & 0.00 & 0.00 & 0.00 \\
0.25 & 0.00 & 0.00 & 10.00 \\
0.50 & 10.00 & 10.00 & 10.00 \\
0.75 & 10.00 & 20.00 & 10.00 \\
1.00 & 100.00 & 100.00 & 20.00 \\ \hline
75th-25th & 10.00 & 20.00 & 0.00 \\ \hline
\end{tabular}
\begin{tabular}{r@{~=~}l}
min&0\\
max&100\\
num datums & 1276\\
\end{tabular}

\end{document}  
