A Survey Asked 857 People How Many Times Per Week

Multiple Choice

A survey asked 857 people how many times per week they dine out at a restaurant. The results are presented in the following table.
$\begin{array}{cc}\hline \text { Number of Times } & \text { Frequency } \\\hline 0 & 136 \\1 & 254 \\2 & 233 \\3 & 104 \\4 & 74 \\5 & 21 \\6 & 28 \\7 & 7 \\\hline \text { Total } & 857\end{array}$

Consider the 857 people to be a population. Let $X$ be the number of times per week a person dines out for a person sampled at random from this population. Compute the standard deviation.

A) 2.1
B) 1.9
C) 2.3
D) 1.5