This textbook clearly communicates statistical competencies to students, allows for practice and evaluation, and arranges competencies in a hierarchy. It employs a martial arts-inspired belt system, awarding students new achievement ranks after they've demonstrated mastery of key concepts. The second edition includes revisions throughout the text, updated images in Chapters 12 and 13, a new pedagogical feature in each chapter called Blackbelt Challenge Questions, and a new contributing author, Catrina Notari.