Chapter 12
Testing More Than Two Samples
IN THIS CHAPTER
Understanding why multiple t-tests don’t work
Working with ANOVA
Taking the next step after ANOVA
Working with repeated measures
Performing a trend analysis
ANOVA on the iPad
Statistics would be limited if you could only make inferences about one or two samples. In this chapter, I discuss the procedures for testing hypotheses about three or more samples. I show what to do when samples are independent of one another and what to do when they’re not. In both cases, I discuss what to do after you test the hypotheses.
I also introduce Excel data analysis tools that do the work for you. Although these tools aren’t at the level you’d find in a dedicated statistical package, you can combine them with Excel’s standard features to produce some sophisticated analyses.
Testing More than Two
Imagine this situation: Your company asks you ...
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