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

Multiple Choice

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.