\begin{tikzpicture}
\begin{axis}[
	axis lines*=middle,
	enlargelimits = false,
	clip=false,
	scale only axis,
	hide y axis,
	width=0.5\textwidth,
	height=0.15\textwidth,
	ymin=-1.3,
	ymax=1.3,
	xmin=-11,
	xmax=11,
	axis line style={->,>=stealth},
	xlabel={\small $n$},
	every axis x label/.style={
		at={(ticklabel* cs:1)},
		xshift=0.2cm,
		anchor=north,
	},
	ytick=\empty,
	xtick=\empty,
	every outer y axis line/.append style={white!15!black},
	every y tick label/.append style={font=\color{white!15!black}},
	legend style={draw=white!15!black,fill=white,legend cell align=left}]
	\addplot[ycomb, mark=*, fill=white, mark options={scale=0.75, fill=white}, line width=1pt, domain=-10:10, samples=21] {rand};
\end{axis}
\end{tikzpicture}
