Approximate the Population Standard Deviation Given the Following Frequency Distribution

Multiple Choice

Approximate the population standard deviation given the following frequency distribution.
$\begin{array} { c c } \hline \text { Class } & \text { Frequency } \\\hline 0 - 19 & 10 \\20 - 39 & 14 \\40 - 59 & 12 \\60 - 79 & 11 \\80 - 99 & 8 \\\hline\end{array}$

A) 26.7
B) 699.0
C) 711.9
D) 26.4