The Following Table Presents the Heights (In Inches) of a Sample

Multiple Choice

The following table presents the heights (in inches) of a sample of college basketball play
$\begin{array}{cc}\hline \text { Height (in.) } & \text { Frequency } \\\hline 68-71 & 11 \\72-75 & 56 \\76-79 & 54 \\80-83 & 40 \\84-87 & 13 \\\hline\end{array}$
Considering the data to be a population, approximate the standard deviation of the heights .

A) 77.7
B) 4.2
C) 17.6
D) 4