- Independent Variable: Out of two variables having cause-effect relationship, the causal variable is called independent variable. It is denoted by X.
- Dependent Variable: Out of two variables having cause-effect relationship, the effect variable is called dependent variable. It is denoted by Y.
- Regression : A functional relationship between two correlated variable is called regression.
To study the regression an axiomatic assumption that there is cause-effect relation between two variables is taken.
The literal meaning of regression is ‘to avert’ or ‘return to the mean value’
