ABSTRACT
The statistical technique 'correlation' establishes the degree and direction of linear relationship between two or more variables. The statistical tool with the help of which we can estimate or predict the unknown variable from known variable is called regression. The term regression was first used as a statistical concept by Sir Francis Galton. The regression technique can be extended to three or more variables. Regression analysis is of great practical use even more than the correlation analysis. The regression analysis is very useful for prediction purposes. Once a functional relationship is established, the value of the dependent variable can be estimated from the given value of the independent variable. The variable, which is used to predict the variable of interest, is called Independent variable.
