Research Methods for Graduate Business and Social Science Students is a fundamental and easy guide to studying research methods. In addition to the general concepts relating to research methods, broad research issues and theoretical concepts critical to research are discussed. The book is written in a reader-friendly manner and contains plenty of examples and helpful practical exercises at the end of each chapter to reinforce and enjoy learning.
Chapter 12: Correlation and Regression
Correlation and Regression
In this chapter we shall consider measuring the association between variables and, if they are linked theoretically, how one can build a model of the relationship. We will begin with only two variables and later in the chapter more variables will be introduced.
The Pearson's Product Moment Correlation Coefficient (r) is a measure of the degree of association between variables. It takes a value between −1 and 1. A value of r near to 1 indicates strong positive association, for example, a person's height and weight, whereas a value of r near to −1 indicates a strong negative linear association, for example, amount of alcohol consumed and performance in a test. When r = ± this indicates that the two variables ...