An experimenter computing the correlation between age and memory span would
A) be able to show that old age produces a decrease in memory span.
B) be able to determine that a third variable was involved.
C) make an error because age and memory span are measured on different scales.
D) be able to determine whether there is a relationship between age and memory span.

Question

Quizplus · Accepted Answer

Correlation analysis helps in determining the relationship between two variables. It does not imply causation or identify third variables, nor does it require the variables to be on the same scale, only that they are quantitatively measured.

An Experimenter Computing the Correlation Between Age and Memory Span