\begin{knitrout}
\definecolor{shadecolor}{rgb}{0.969, 0.969, 0.969}\color{fgcolor}\begin{kframe}
\begin{alltt}
\hlkwd{mean}\hlstd{(df}\hlopt{$}\hlstd{rost,} \hlkwc{na.rm} \hlstd{= T)}
\end{alltt}
\begin{verbatim}
## [1] 170
\end{verbatim}
\begin{alltt}
\hlkwd{sd}\hlstd{(df}\hlopt{$}\hlstd{rost,} \hlkwc{na.rm} \hlstd{= T)}
\end{alltt}
\begin{verbatim}
## [1] 15.81139
\end{verbatim}
\begin{alltt}
\hlkwd{median}\hlstd{(df}\hlopt{$}\hlstd{rost,} \hlkwc{na.rm} \hlstd{= T)}
\end{alltt}
\begin{verbatim}
## [1] 167.5
\end{verbatim}
\end{kframe}
\end{knitrout}