This best-selling introduction to statistical analysis in the social sciences provides the right balance of conceptual understanding and step-by-step computational techniques. Every edition is thoroughly updated. Some exciting new features updated in this edition: bull; Problem sets have been revised and expanded, with many new problems from many fields of study: sociology, political science, psychology, economics, education, criminal justice, urban planning, health and medicine, etc. Examples have been updated throughout with the most recent data available from government and private sources. New boxed inserts, Practical and Statistical, give examples of how statistical measures are applied in everyday life.