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Difference between covariance and correlation ?

asked Jan 7 in Artificial Intelligence(AI) & Machine Learning by Nisha Goeduhub's Expert (3.1k points)

In this article we will learn what is the difference between correlation and covariance.

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1 Answer

answered Jan 7 by Nisha Goeduhub's Expert (3.1k points)
edited Feb 13 by Nisha

Best answer

Covariance is measured to indicate at what extent and how much two variables change in tandem (in partnership or conjunction). On the other hand Correlation represent relationships between two variables.
We can't measure strength of relationship of two variables in covariance, while in correlation we have correlation coefficient to measure strength of relation.
As we know correlation is measured without unit (dimensionless) while covariance is measured with unit. meaning correlation is a special case of covariance, which can be obtain when data is standardized.
Covariance basically represent direction of relationship of two variables and correlation represent how variables related to each other and strength of relation.

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