When Working with Grouped Data, an Approximate Class Width Can

question 41

Multiple Choice

When working with grouped data, an approximate class width can be calculated as .

• A)smallest value minus largest value divided by sample size
• B)largest value minus smallest value divided by the number of classes
• C)the number of classes divided by the range
• D)the range divided by the actual class width
• E)largest value plus smallest value divided by the number of classes

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Definitions:

Trolley Valve

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

Service Application Valves

Valves used in the maintenance and repair process of various systems, allowing for the control or direction of flow during service.

Spike

A sudden surge in hydraulic pressure or electrical voltage. Also a slang term meaning the tractor steering column mounted, trailer service brake valve.

Tractor Protection Valve (TP)

A safety device on tractor-trailer combinations that protects the air brake system from losing air pressure in the event of a trailer breakaway or leak.