[Tex/LaTex] Space between rows in a table

spacingtables

I created a table in LaTeX, however, I can not put a space after the first row. As you can see the bar of X mean overlaps the \hline. I tried \\[1pt] after \hline, but it produced much more space than I expected. The code I wrote is shown below.
Table

\begin{center}
\begin{tabular}{l@{\hskip 0.3in}c@{\hskip 0.2in} c@{\hskip 0.2in} c@{\hskip 0.2in} c@{\hskip 0.3in} l}
\hline
& $\delta$ & $\varepsilon$ & $\eta$ & $w$ & $c_{i}~(i=1,...,k)$\\ 
\hline
$\overline{y}_{RW(st)}=\overline{y}_{st} \dfrac{\overline{X}}{w\overline{x}_{st}+(1-w)\overline{X}}$ & -1 & -1 & -1 & & $(-w)^{i}$\\[10pt]
$\overline{y}_{Gu(st)}=\overline{y}_{st}\left[w\dfrac{\overline{X}}{\overline{x}_{st}}+(1-w)\left(\dfrac{\overline{X}}{\overline{x}_{st}}\right)^{2}\right]$ & -1 & -1 & 1 & & $(-1)^{i}[i(1-w)+1]$\\

....

\hline
\end{tabular}
\end{center}

Best Answer

IMHO the most convenient way is to use the booktabs package to add extra white space around the horizontal lines which are called according to their position \toprule, \midrule and \bottomrule.

\documentclass[a4paper]{article}

\usepackage{amsmath}
\usepackage{booktabs}

\begin{document}
\begin{center}
\begin{tabular}{l@{\hskip 0.3in}c@{\hskip 0.2in} c@{\hskip 0.2in} c@{\hskip 0.2in} c@{\hskip 0.3in} l}
\toprule
 & $\delta$ & $\varepsilon$ & $\eta$ & $w$ & $c_{i}~(i=1,...,k)$\\ 
 \midrule
$\overline{y}_{RW(st)}=\overline{y}_{st} \dfrac{\overline{X}}{w\overline{x}_{st}+(1-w)\overline{X}}$ & -1 & -1 & -1 & & $(-w)^{i}$\\[10pt]
$\overline{y}_{Gu(st)}=\overline{y}_{st}\left[w\dfrac{\overline{X}}{\overline{x}_{st}}+(1-w)\left(\dfrac{\overline{X}}{\overline{x}_{st}}\right)^{2}\right]$ & -1 & -1 & 1 & & $(-1)^{i}[i(1-w)+1]$\\    
\bottomrule
\end{tabular}
\end{center}

\end{document}

booktabs-MWE

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