This easy-to-read applied statistics text aims to provide students with a working knowledge of key concepts and formulae through a step-by-step approach to solving the kind of research problems likely to be encountered in undergraduate psychology courses. Problems interspersed throughout each chapter encourage students to keep a check on their understanding of the material as they go along. Non-parametric statistical tests are presented along with comparable parametric statistical tests as a way of emphasizing that scale of measurement, population characteristics, and sampling procedures are important to data analysis and interpretation.