If we have a test called "x" and r_xx = .80, this means A)80% of the differences in test scores is due to error and only 20% is due to true variance. B)20% of the test scores were used to obtain the reliability estimate. C)20% of the differences in test scores is due to error and 80% is due to true variance. D)the test average is in the low 'B' range.

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Quizplus · Accepted Answer

The notation r_xx = .80 refers to a reliability coefficient, indicating that 80% of the variance in test scores is due to true score variance (i.e., actual differences in what is being measured) and 20% is due to error variance.

If We Have a Test Called "X" and Rxx =

If We Have a Test Called "X" and R_xx =