Provide an Appropriate Response A) $4.7$ B) $7.0$ C) $4.9$ D) $5.2$

Multiple Choice

Provide an appropriate response.
-The manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The frequency distribution below summarizes the results. Find
The standard deviation. Round your answer to one decimal place. $\begin{array}{c|c}\begin{array}{r}\text { Waiting time } \\\text { (minutes) }\end{array} & \begin{array}{c}\text { Number of } \\\text { customer }\end{array} \\\hline 0 \text {-under } 4 & 13 \\4 \text {-under } 8 & 12 \\8 \text {-under } 12 & 12 \\12 \text {-under } 16 & 12 \\16 \text {-under } 20 & 0 \\20 \text {-under } 24 & 1\end{array}$

A) $4.7$
B) $7.0$
C) $4.9$
D) $5.2$