Following Are the Closing Prices (In Dollars) of a Certain

Multiple Choice

Following are the closing prices (in dollars) of a certain stock for the past 20 trading days.
$\begin{array}{llllllllll}\hline 153.21 & 151.33 & 155.74 & 147.55 & 123.45 & 151.24 & 145.02 & 127.33 & 157.17 & 125.64 \\\hline 145.78 & 142.76 & 125.17 & 126.34 & 153.05 & 130.41 & 141.26 & 137.18 & 147.74 & 147.19 \\\hline\end{array}$
Find the population standard deviation for the closing prices.

A) $11.39
B) $33.72
C) $141.73
D) $11.10