[Tex/LaTex] Continuous vertical line using booktabs in tabularx table

booktabstablestabularxvertical alignment

How can we draw a continuous vertical line using booktabs in table?
What is the simplest method to maximise the width of a table?
There are lots of methods, very confusing. 

\documentclass{article}
\usepackage{makecell} % for bold in table using \small
\renewcommand\theadfont{\small} % for bold in table using \small
\usepackage{tabularx, ragged2e} 
\usepackage{booktabs}

\begin{document}

\begin{table}[!ht]
\centering
    \begin{tabularx}{\textwidth}{l>{\raggedright\arraybackslash}ccc|ccc}
    \toprule
    & \multicolumn{3}{c|}{\textbf{Paired Differences1}} & \multicolumn{3}{c}{\textbf{Paired Differences2}}\\
     \cmidrule{2-7}
    & \small {\textbf{Statistic}}
     & \thead{\small {\textbf{df}}}
     & \thead{\small {\textbf{Sig.}}}
         & \small {\textbf{Statistic}}
     & \thead{\small {\textbf{df}}}
     & \thead{\small {\textbf{Sig.}}}    \\ 
\midrule
    Difference & 44.20 & 14.36 & 4.54 & .957 & 10 & .746\\
        \bottomrule
    \end{tabularx}
\caption{Testing Testing Testing%
    \label{tab:test1234}% 
    }  
\end{table}

\end{document}

enter image description here

Best Answer

Here is my suggestion. I have used tabular* in combination with @{\extracolsep{\fill}} to make the table as wide as the textwidth and to evenly distribute the excess white space between the columns. I have also removed the vertical line and replaced the single \cmidrule by two adjacent ones with a small white space inbetween. In order to clean up the code, I have also removed the repeated occurences ot \small and \textbf and instead added \bfseries to \thedfont:

enter image description here

\documentclass{article}
\usepackage{makecell} % for bold in table using \small
\renewcommand\theadfont{\small\bfseries} % for bold in table using \small
\usepackage{tabularx, ragged2e} 
\usepackage{booktabs}

\begin{document}

\begin{table}[!ht]
    \begin{tabular*}{\textwidth}{@{\extracolsep{\fill}}lcccccc}
    \toprule
    & \multicolumn{3}{c}{\textbf{Paired Differences1}} & \multicolumn{3}{c}{\textbf{Paired Differences2}}\\
     \cmidrule(r){2-4} \cmidrule(l){5-7}
    & \thead{Statistic}
     & \thead{df}
     & \thead{Sig.}
         & \thead{Statistic}
     & \thead{df}
     & \thead{Sig.}    \\ 
\midrule
    Difference & 44.20 & 14.36 & 4.54 & .957 & 10 & .746\\
        \bottomrule
    \end{tabular*}
\caption{Testing Testing Testing%
    \label{tab:test1234}% 
    }  
\end{table}

\end{document}
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