If measurement errors are truly random, then they should
A) never occur.
B) not affect the reliability of a measure.
C) not attenuate the validity of a measure.
D) sum to zero.

Question

Quizplus · Accepted Answer

When measurement errors are truly random, they are as likely to be positive as they are to be negative, meaning over a large number of measurements, the errors should average out, or sum to zero. This is a fundamental principle in statistics and measurement theory.

If Measurement Errors Are Truly Random, Then They Should