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

question 142

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) \(5.2\)

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Definitions:

Secondary Shoe

In drum brakes, the brake shoe that is positioned to be actuated secondarily during brake application.

Primary Shoe

The brake shoe in a drum brake system that is closest to the front of the vehicle, playing a critical role in stopping the car.

Duo-servo Brakes

A brake system design where two brake shoes press outward against a drum, with each shoe's action amplifying the other's, enhancing braking efficiency.

Anchor

A device, usually made of metal, used to connect an object to a base or a fixed point to prevent or restrict movement.