Doing Statistical Analysis

4 Associational Research Questions II Multiple Regression

DOI: 10.4324/9781003252559-4

4.1 Introduction and Chapter Overview

This chapter introduces multiple regression analysis. Section 4.2 begins where Section 3.6 left off; we examine the association between x₁ and y while simultaneously controlling for a second and a third x-variable, x₂, and x₃. Section 4.3 then formalizes the classic multiple linear regression equation and discusses the linear regression model per se.

We have thus far been concerned with linear regression. That is, we have assumed that a straight regression line could summarize the association between x₁ and y. Sometimes, however, such a straight line is too simplistic a representation of how x₁ relates to y. More precisely, ...