True or False: The standard deviation of the sampling distribution of a sample proportion is 
where π is the population proportion.
Definitions:
FMVSS 121
Federal Motor Vehicle Safety Standard 121, which specifies the requirements for air brake systems in heavy vehicles, ensuring safety and reliability.
Maximum Stopping Distance
The furthest distance a vehicle can travel from the point where brakes are fully applied to when it comes to a complete stop.
Mph
Miles per hour, a unit of speed indicating the number of miles covered in one hour.
Dual Circuit Foot Valve
A type of valve used in air brake systems, allowing for control of two separate circuits with one pedal.
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