correlations

Noun

correlation (countable and uncountable, plural correlations)

1. A reciprocal, parallel or complementary relationship between two or more comparable objects.
   • clear 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 Ahmed, “How protected are we against Covid-19? Scientists search for a test to measure immunity”, in CNN
3. An isomorphism from a projective space to the dual of a projective space, often to the dual of itself.