Introduction to Descriptive Statistics and Correlation

A Program for Self-instruction

When the relationship between the variables is strong, you might expect the
correlation coefficient to be a relatively large number; when the relationship is
weak, you might expect the ii to be a relatively M number. 6-59 For example, one
would expect that students with high college aptitude scores will tend to make _M
grades in college. But since there are other factors than aptitude which affect
grades (motivation is one such factor), the M between the two variables will not
be perfect ...