Book Description: Intended for graduate-level courses in statistics for psychology majors, this best-seller has earned high marks among students and instructors for its clear, conceptual approach and strong emphasis on experimental psychology.The author presents statistics at an intuitive level to give students a sense of how tests work and how they interrelate. Stressing the value of data analysis before jumping in with a hypothesis test, Howell examines the connection between statistical tests and the theoretical questions posed by such experiments to develop students' conceptual skills. New to the Fourth Edition are: -- Additional real-life examples from published literature, including new extended examples-- Stronger emphasis on computer calculations, with new output examples from Minitab "RM", SPSS "RM", JMP IN, and SAS computer packages-- Greater depth on categorical data analysis that gives more attention to odds ratios and less to goodness-of-fit as a guide to interpretation-- An entirely new chapter on log-linear models and their use in the behavioral sciences-- An updated multiple comparison chapter that broadens the concept of Bonferroni procedures