The Mean Weight of Trucks Traveling on a Particular Section

question 30

Multiple Choice

The mean weight of trucks traveling on a particular section of I-475 is not known. A provincial
Highway inspector needs an estimate of the mean. He selects a random sample of 49 trucks
Passing the weighing station and finds the mean is 15.8 tonnes, with a standard deviation of the
Sample of 4.2 tonnes. What is probability that a truck will weigh less than 14.3 tonnes?

• A) 0.0062
• B) 0.3632
• C) 0.1368
• D) 0.4938

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Definitions:

Steering Linkage

The system of rods, levers, and bars that connects a vehicle's steering wheel to its wheels, allowing the driver to control the direction of the vehicle.

Bump Steer

A change in the steering angle of a vehicle’s wheel as a result of suspension movement, typically caused by bumps or irregularities on the road surface.

Crosslink System

A type of polymer structure where chains are connected by links, improving the material's strength and stability.

Idler Arm

A component in a vehicle's steering system that supports the steering linkage and helps maintain correct wheel alignment.