Economic status generally correlates with academic performance, but not always.
Although larger brains generally correlate with higher intelligence, it is not the only factor.
Thus, childlessness is generally correlated with working full time.
Fluid intelligence generally correlates with measures of abstract reasoning and puzzle solving.
In the Rhayader basin, grade is generally correlated with depth of overburden.
Another way is to subdivide the region into sub-areas that generally correlate to either culture areas or specific physiographic regions.
Solar minima are not generally correlated with changes in climate but recent studies have shown a correlation with regional weather patterns.
Weight generally correlates to gestational age, however, infants may be underweight for other reasons than a preterm delivery.
The size of a mysid brood generally correlates to body length and environmental factors such as density and food availability.
Immunocytochemical staining for pituitary hormones generally correlates with hormone serum levels.