Chapter 14
Regression: Linear and Multiple
In This Chapter
Summarizing a relationship
Working with regression
Hypothesis testing and regression
Balancing many relationships
One of the main things you do when you work with statistics is make predictions. The idea is to take data on one or more variables, and use these data to predict a value of another variable. To do this, you have to understand how to summarize relationships among variables, and to test hypotheses about those relationships.
In this chapter, I introduce regression, a statistical way to do just that. Regression also enables you to use the details of relationships to make predictions. First, I show you how to analyze the relationship between one variable and another. Then I show you how to analyze the relationship between a variable and two others. These analyses involve a good bit of calculation, and Excel is more than equal to the task.
The Plot of Scatter
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