This classic text provides a rigorous introduction to basic probability theory and statistical inference, with a unique balance between theory and methodology. Interesting, relevant applications use real data from actual studies, showing how the concepts and methods can be used to solve problems in the field. This revision focuses on improved clarity and deeper understanding. The StatCrunch eBook offers this text as a Pearson eText. This exciting new version features an embedded version of StatCrunch, allowing students to analyze data sets while reading the book.