Let's start with the positive correlation: books in the home equal higher test scores.
There might even be some positive correlations between these two sets of variables.
This provides a strong base for a positive correlation between perceived ability and career choice.
He found a single common factor explained the positive correlations among tests.
Forty years of research has shown positive correlation between play and children's learning.
Studies have shown a positive correlation between school meal programs and increased food security.
But naturally there is a strong positive correlation between them.
These two variables have a positive correlation with each other.
Then there is the positive correlation between more education and fewer children.
A number of studies found a positive correlation between video game play and increased violent behavior.