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 players.

$\begin{array} { c c } \hline \text { Height (in.) } & \text { Frequency } \\\hline 68 - 71 & 17 \\72 - 75 & 40 \\76 - 79 & 62 \\80 - 83 & 40 \\84 - 87 & 18 \\\hline\end{array}$

Considering the data to be a population, approximate the standard deviation of the heights.

A) 78
B) 4
C) 19.9
D) 4.5