Any measurement that is made in an experiment is to detect a change. Without change, there is no meaning to experimenting. Similarly, the world is governed by formulas of classical mechanics that are based on changes in variables. Understanding the change that occurs in a variable based on the changes in another variable is an important way of measurement.
The parameters used to measure such kinds of relative changes that happen in a variable based on some other variables are correlation and covariance. These parameters help measure how much a variable changes and the relationship that two variables share when one variable changes based on the changes in the other variable.
Formula of Covariance and Correlation
What are covariance and correlation? Read here to know the definition and formula of Covariance and Correlation.
