\documentclass[tikz,border=5pt]{standalone}
\usepackage[utf8]{inputenc}
\usepackage{xcolor}
\usepackage{tikz}
\usetikzlibrary{arrows}
\usepackage{pgfplots}
\pgfplotsset{compat=1.8, axis line style={-}
}\usepgfplotslibrary{statistics}
\tikzset{->}
\begin{document}
\begin{tikzpicture}
\begin{axis}[scale only axis,axis y line*=left,xlabel=Correlation coefficient,ylabel=Granularity (ms),xtick={-1,-0.75,-0.5,-0.25,0,0.25,0.5,0.75,1},ytick={1,2,3,4},yticklabels={,50,,25}]\addplot+[boxplot prepared={median=0.3748265060853671,upper quartile=0.5311504229653238,lower quartile=0.20723613011666422,upper whisker=0.9860673830581479,lower whisker=-0.585141477405567,every box/.style={very thick,draw=darkgray},every whisker/.style={darkgray,ultra thick},every median/.style={black,ultra thick}}]coordinates{};
\addplot+[boxplot prepared={median=0.8380289991624813,upper quartile=0.920657832626553,lower quartile=0.6662540159193733,upper whisker=0.997511396754998,lower whisker=-0.503442675649323,every box/.style={very thick,draw=darkgray},every whisker/.style={darkgray,ultra thick},every median/.style={black,ultra thick}}]coordinates{};
\addplot+[boxplot prepared={median=0.2581600559087288,upper quartile=0.38941377564814855,lower quartile=0.1393759609055864,upper whisker=0.9609968342412637,lower whisker=-0.43390210869316825,every box/.style={very thick,draw=teal},every whisker/.style={teal,ultra thick},every median/.style={black,ultra thick}}]coordinates{};
\addplot+[boxplot prepared={median=0.6874070257823587,upper quartile=0.8072005997779843,lower quartile=0.5133970476483278,upper whisker=0.9915033790373978,lower whisker=-0.38116561932412774,every box/.style={very thick,draw=teal},every whisker/.style={teal,ultra thick},every median/.style={black,ultra thick}}]coordinates{};
\end{axis}
\begin{axis}[scale only axis,axis y line*=right,axis x line=none,xtick={-1,-0.75,-0.5,-0.25,0,0.25,0.5,0.75,1},ytick={1,2,3,4},yticklabels={(S),(R),(S),(R)}]
\addplot+[boxplot prepared={median=0.3748265060853671,upper quartile=0.5311504229653238,lower quartile=0.20723613011666422,upper whisker=0.9860673830581479,lower whisker=-0.585141477405567,every box/.style={very thick,draw=darkgray},every whisker/.style={darkgray,ultra thick},every median/.style={black,ultra thick}}]coordinates{};
\addplot+[boxplot prepared={median=0.8380289991624813,upper quartile=0.920657832626553,lower quartile=0.6662540159193733,upper whisker=0.997511396754998,lower whisker=-0.503442675649323,every box/.style={very thick,draw=darkgray},every whisker/.style={darkgray,ultra thick},every median/.style={black,ultra thick}}]coordinates{};
\addplot+[boxplot prepared={median=0.2581600559087288,upper quartile=0.38941377564814855,lower quartile=0.1393759609055864,upper whisker=0.9609968342412637,lower whisker=-0.43390210869316825,every box/.style={very thick,draw=teal},every whisker/.style={teal,ultra thick},every median/.style={black,ultra thick}}]coordinates{};
\addplot+[boxplot prepared={median=0.6874070257823587,upper quartile=0.8072005997779843,lower quartile=0.5133970476483278,upper whisker=0.9915033790373978,lower whisker=-0.38116561932412774,every box/.style={very thick,draw=teal},every whisker/.style={teal,ultra thick},every median/.style={black,ultra thick}}]coordinates{};
\end{axis}
\end{tikzpicture}
\end{document}