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. $$\begin{array} { l l l l l l l l l l } \hline 149.54 & 131.62 & 132.99 & 144.42 & 132.58 & 133.24 & 135.52 & 139.78 & 152.12 & 134.13 \\\hline 126.81 & 131.94 & 133.29 & 142.06 & 156.96 & 139.56 & 125.11 & 158.80 & 129.80 & 144.99 \\\hline\end{array}$$ Find the population standard deviation for the closing prices.

A) $9.44
B) $138.76
C) $9.68
D) $33.69