Chapter 13
Slightly More Complicated Testing
IN THIS CHAPTER
Working with two variables
Working with replications
Understanding interactions
Mixing variable types
Two-factor ANOVA on the iPad
In Chapter 11, I show you how to test hypotheses with two samples. In Chapter 12, I show you how to test hypotheses when you have more than two samples. The common thread through both chapters is that one independent variable (also called a factor) is involved.
Many times, you have to test the effects of more than one factor. In this chapter, I show how to analyze two factors within the same set of data. Several types of situations are possible, and I describe Excel data analysis tools that deal with each one.
Cracking the Combinations
FarKlempt Robotics, Inc., manufactures battery-powered robots. The company’s leaders want to test three rechargeable batteries for these robots on a set of three tasks: climbing, walking, and assembling. Which combination of battery and task results in the longest ...
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