A test has a reliability coefficient of .75.This coefficient indicates that
A) 56 percent of the variance in scores is true variance.
B) 75 percent of the variance in scores is true variance.
C) 25 percent of the variance in scores is true variance.
D) 75 percent of the test items are valid.

Question

Quizplus · Accepted Answer

The reliability coefficient of .75 indicates that 75 percent of the variance in scores is due to true variance, meaning that the test is consistent and reliable in measuring the construct it intends to measure. Option A is incorrect because it implies that only 56 percent of the variance is true variance, which is lower than the actual reliability coefficient. Option C is also incorrect as it implies that only 25 percent of the variance is due to true variance, which is much lower than the actual reliability coefficient. Option D is not related to the concept of reliability coefficient and is therefore incorrect.

A Test Has a Reliability Coefficient of