I'm using the ninth edition in a statistics course, but it worries me the "flexibility" of the author about what is measurable: for example, in chapter 10, introducing ANOVA, it uses an example with two nomial variables (or an ordinal, at best), while just two lines before it stated ANOVA can only be used with interval-ratio variables... the solution? "Suppose we administered a scale that measures support for capital punishment at the interval-ratio level"