Correlation is used to describe the linear relationship between two continuous variables (e.g., height and weight). In general, correlation tends to be used when there is no identified response variable. It measures the strength (qualitatively) and direction of the linear relationship between two or more variables.

How is correlation used in real life?

When an employee works more hours his paycheck increases proportionately. The more gasoline you put in your car, the farther it can go. The longer someone invests, the more compound interest he will earn. The longer amount of time you spend in the bath, the more wrinkly your skin becomes.

What is the uses of correlation in statistics?

Correlation is a statistical method used to assess a possible linear association between two continuous variables. It is simple both to calculate and to interpret.