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Technician A says universal joints allow the drive shaft to change angles in response to rear axle movements. Technician B says universal joints keep the drive shaft length constant as the drive shaft changes angles. Who is correct?
Face Validity
Assesses whether an instrument appears to look like it measures what it is meant to measure.
Validity
The extent to which a test or instrument measures what it is supposed to measure.
Accuracy
The degree to which a measurement, calculation, or specification conforms to the correct value or a standard.
Validity
The extent to which a test or instrument accurately measures what it is intended to measure.
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