ABSTRACT
In the previous chapter, it was shown how regression and correlation analysis are used for purposes of prediction and planning. The techniques and concepts presented were used as a tool in analyzing the relationship that may exist between two variables. A single independent variable was used to estimate the value of the dependent variable. In this chapter, you will learn about the concepts of regression and correlation where two or more independent variables are used to estimate the dependent variable and make a forecast. There is only one dependent variable (as in the simple linear regression), but several independent variables. This improves our ability not only to estimate the dependent variable, but also to explain more fully its variations.
