So it is difficult to make a simple correlation between dissolved oxygen and chlorine level.

Hooks, police officers say, have a simple correlation to careers.

There is no simple correlation between the size of the dye molecules and their color, darkness or lightness.

The authors offer both some simple correlations and some more elaborate theories.

But simple correlation cannot account for the slew of factors that influence drug consumption over time and place.

So it's not a simple correlation between transmittance and wavelength.

Case studies aside, modern experiments have demonstrated that the relation between brain and mind is much more than simple correlation.

The comic has appeared daily since May 2008 and features a giraffe pointing to the simple correlation of the day.

No study has found a simple correlation, for example, between testosterone levels and crime.

Campbell writes that "there is not a simple linear correlation between female status and rates of wife assault."