\documentclass{article}
%\usepackage{xepersian}
 \usepackage{rotating}
 \begin{document}

\begin{sidewaystable}[h]
\begin{tabular}{|l r|c|c|c|l r|c|c|l r|}\hline
$n $&$ s$&$ ER({\widehat{Y}}_{MLP}) $&$  ER({\widehat{Y}}_{CMP})  $&$ ER({\widehat{Y}}_{BS})  $&$  ER_{m=10}({\widehat{Y}}_{EBS})  $&$ ER_{m=50}({\widehat{Y}}_{EBS})  $&$ a $&$ ER({\widehat{Y}}_{BL}) $&$   ER_{m=10}({\widehat{Y}}_{EBL})  $&$   ER_{m=50}({\widehat{Y}}_{EBL}) $\\\hline
 & & & & & & & $-1$ & $283.818$  &  $729.228$  &  $752.106$ \\
  & & & & & & & $-.1$ & $44.175$  &  $65.056$ & $54.348$ \\
 $2$ & $3$  &  $29.600$  & $19.793$  &  $20.362$  &  $17.693$  &  $17.715$  &   $-.001$ &  $20.365$  &  $17.553$  & $17.726$  \\\cline{8-11}  
 & & & & & & & $.001$ & $20.377$ & $17.556$  & $17.718$  \\
 & & & & & & & $.1$  & $21.070$  &  $18.147$ & $18.057$ \\ 
  & & & & & & & $1$ & $24.189$   & $22.297$ & $22.108$ \\ \hline
\end{tabular}
\end{sidewaystable}

\end{document}