\documentclass[border = 3mmm]{standalone}
\usepackage{pgfplots}
\pgfplotsset{width=10cm,height=2.15cm,compat=newest}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
xmin=47.5,
xmax=66.5,
% hide y axis,
axis y line=none,
axis x line=bottom,
axis x line shift={4pt},
every outer x axis line/.append style={stealth-stealth},
title={},
xlabel={data set 4}]
\addplot [only marks, black, mark=*, mark size=2pt] coordinates{(48, 1)(49, 1)(49, 2)(51, 1)(52, 1)(52, 2)(53, 1)(55, 1)(57, 1)(57, 2)(60, 1)(60, 2)(60, 3)(61, 1)(62, 1)(64, 1)(66, 1)(66, 2)};
\end{axis}
\end{tikzpicture}
\end{document}