If the reliability coefficient for a set of test scores is .90, we know that
A) 90 % of the variance is true variance; 10 % is unknown.
B) 90 % of the variance is true variance; 10 % is error.
C) 90 % of the variance is true variance; 10 % is reliable.
D) 81 % of the variance is true variance; 19 % is error.
E) 81 % of the variance is true variance; 19 % is unknown.

Question

Quizplus · Accepted Answer

A reliability coefficient of .90 means that 90% of the variance in the scores is due to true variance, while the remaining 10% is due to error variance. Therefore, option B is the correct choice. Options A, C, D, and E are incorrect.

If the Reliability Coefficient for a Set of Test Scores