17.1 Types of Comparisons
Drawing comparisons between samples is perhaps the most common and important use of statistics. Throughout this chapter, we will be comparing two samples obtained under different conditions. These comparisons share a common theme—which conditions produce better results—but differ in how the comparison is done. Consider the comparison of two diets suggested in the introduction to this chapter. Think of the various questions that one might ask. Each of the following questions leads to a different method of analysis that is covered in the section listed with the question.
Does a higher proportion of people lose weight on the proprietary diet? (17.3)
What can we say about the difference in proportions who lose weight? (17.4) ...
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