When a Relationship Is Found Using the Pearson Correlation Technique

question 23

Multiple Choice

When a relationship is found using the Pearson correlation technique on sample data,this does not mean there is a non-zero correlation in the population,because of _____.

• A)sampling error
• B)sample size
• C)restriction of range
• D)none of these,since it will always exist in the population if it is present in the sample

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Definitions:

FMVSS-121

The Federal Motor Vehicle Safety Standard addressing air brake systems in heavy-duty vehicles to ensure safety through performance requirements.

Service Brake Circuit

The network of components, including lines, valves, and actuators, that allows a vehicle to decelerate or stop by hydraulic or mechanical means.

Charged with Air

Typically refers to pneumatic systems or equipment that has been pressurized with air for operation or use.

Trolley Valve

A valve used in air brake systems on trucks and trailers, allowing the driver to control the trailer brakes independently.