correlation

Noun

1. A reciprocal, parallel or complementary relationship between two or more comparable objects.
   • clear correlation
   • positive correlation
   • strong correlation
2. One of the several measures of the linear statistical relationship between two random variables, indicating both the strength and direction of the relationship.
   • For example, scientists can use data from larger studies about the correlation between antibody levels and vaccine efficacy in adults to make a prediction about vaccine efficacy in children. - 2022 March 22, Tasnim...
   • While there are physiological changes throughout the day that may influence how you handle things, there are bigger correlations between mental health and well-being and time of year, according to Rutledge. - 2025...
3. An isomorphism from a projective space to the dual of a projective space, often to the dual of itself.