\begin{Schunk}
\begin{Sinput}
 str(dat)
\end{Sinput}
\begin{Soutput}
'data.frame':	147 obs. of  4 variables:
 $ GRIP   : num  105.5 106.5 94 90.5 104 ...
 $ ARM    : num  80.5 93 81 33.5 47.5 ...
 $ RATINGS: num  31.8 39.8 46.8 52.2 31.2 46.6 29.8 39 50.6 40.1 ...
 $ SIMS   : num  1.18 0.94 0.84 -2.45 1 4.38 -0.38 -0.01 -0.99 -0.04 ...
\end{Soutput}
\end{Schunk}
