This second edition of a text for intermediate statistics students, and for students in other disciplines who will use statistics, is revised to reflect the development of new methods and software for generalized linear models over the past 10 years, incorporating discussion of developments in survival analysis, nominal and ordinal logistic regression, generalized estimating equations, and multi-level models. Emphasis is placed on graphical methods for exploratory data analysis, visualizing numerical optimization, and plotting residuals. The text assumes a working knowledge of basic statistical concepts and methods and an acquaintance with calculus and matrix algebra.