\documentclass[11pt]{book}
\usepackage{tikz}
\usetikzlibrary{shapes, arrows, arrows.meta}
\usepackage{graphicx, array, amsmath}
\usepackage{pgfplots}
\usepackage{verbatim}
\usepackage{xepersian}
\settextfont{Yas}

\begin{document}
\begin{center}
\begin{tikzpicture}
\begin{axis}
[
xmin=0 , xmax=12.9 , ymin=-3.9 , ymax = 3.9 ,
xtick={1,2,...,11,12} ,
width=9cm , height=6cm ,
xlabel={\rl{شماره نمونه}} , ylabel={$\bar{x}$} ,
ytick align=center , xtick align=center ,
%axis y line=right ,
]
\addplot[color=blue,mark=*] coordinates {
(1,-2.5)
(2,1.5)
(3,1.1)
(4,-2.5)
(5,0.5)
(6,-0.5)
(7,1)
(8,2)
(9,2.7)
(10,0.9)
}; 
\end{axis}
\end{tikzpicture}
\end{center}
\end{document}