In writing this book, we had two overriding goals. The first was to provide a textbook from which graduate and advanced undergraduate students could really learn about data analysis. Over the years we have experimented with various organizations of the content and have concluded that bottom-up is better than top-down learning. In view of this, most chapters begin with an informal intuitive discussion of key concepts to be covered, followed by the introduction of a real data set along with some informal discussion about how we propose to analyze the data. At that point, having given the student a foundation on which to build, we provide a more formal justification of the computations that are involved both in exploring and in drawing conclusions about the data, as well as an ...