CHAPTER 2
Simple Regression
In the last chapter, we looked at correlation analysis where we measured
the linear relationship between pairs of variables. In this chapter we will
use simple regression to develop a model describing the relationship
between a single dependent variable and a single independent variable.
This type of model is not frequently used in business, but understand-
ing simple regression is a good way to begin our discussion of multiple
regression.
Recall from high school geometry that the equation for a straight line
can be written as follows:
Straight Line
Y = mX + b
In this equation, m is the slope of the line and b is the Y- intercept, or just
intercept for short. Simple regression is a process for fitting a line to ...