This introductory statistics text is written for college-level students in any field of study. It can be used in a quarter, semester, or full-year course. Its only prerequisite is high school algebra. Our goal in writing it is to present statistical concepts and techniques inamanner that will teach students not only how and when to utilize the statistical procedures developed, but also to understandwhy these procedures should be used. As a result we have made a great effort to explain the ideas behind the statistical concepts and techniques presented. Concepts are motivated, illustrated, and explained in a way that attempts to increase one’s intuition. It is only when a student develops a feel or intuition for statistics that she or he is really on the path toward making sense of data.