Correlations based upon a homogeneous subset of subjects tend to be lower than for the entire group. This is known as
A) correlation shrinkage
B) power testing
C) restriction of range
D) none of the above

Question

Quizplus · Accepted Answer

Restriction of range occurs when the variability of a variable is limited or restricted, often due to the selection of a homogeneous subset of subjects. This can lead to an underestimation of the true correlation between variables across the entire population.

Correlations Based Upon a Homogeneous Subset of Subjects Tend to Be