Low reliability of the variables reduces the correlation coefficient because
A)the Z scores are less likely to follow a normal curve.
B)the cross-products of the Z scores are less likely to follow a normal curve.
C)it adds random noise to the computations.
D)it reduces random influences that would otherwise add to the overall variance.

Question

Quizplus · Accepted Answer

Low reliability of the variables adds random noise to the computations, which reduces the correlation coefficient. This is because the low reliability adds random error to the data, which makes it more difficult to accurately capture the true relationship between the variables.

Low Reliability of the Variables Reduces the Correlation Coefficient Because