I would like to thank Chris True, AP Statistics teacher and consultant, for reading and editing this book for content. I appreciate his helpful comments and suggestions. I would also like to thank Dan Foster for all of his efforts in editing this book. Dan was extremely easy to work with and provided me with excellent feedback. I am grateful to Judy Littlefield for all of her hard work on the many illustrations and equations.

I extend my thanks to Emi Smith, Senior Acquisitions Editor, and Stacy Hiquet, Publisher and General Manager, for the opportunity to write this book. Their patience, support, and trust are truly appreciated. I would also like to thank Brad Crawford for proofreading. Additional thanks to Sarah Panella, Heather Talbot, Jordan Castellani, Jeff Cooper, and Larry Sweazy.

I am grateful to have had some great teachers while growing up. I want to specifically thank Sandy Halstead for teaching me algebra, algebra 2, trigonometry, and physics. I am grateful to Karen Ackerman for teaching me honors English.

To my students, past and present, thank you for motivating me to be the best teacher I can be. I am inspired by the efforts you make in preparing for the AP Exam. I hope you continue those efforts in all aspects of your lives.

Finally, I would like to thank my friends and family. To my friends—especially John, Chris, Brad, and Tim—thank you for all your support and encouragement. To my friend and department head, Dan Schermer, thanks for always guiding me in the right direction. To Dean and my “painting buddies,” thanks for providing me many hours of fun and stress relief as we worked together. Special thanks to Nick and Chad for helping me with graphs and images. To Bob and Carol, thanks for all of your support. To all of my extended family, thank you for all of the help you have given to me, Lori, and our children. To my parents, Don and Joan McAfee, thank you for being great parents and helping me develop a strong work ethic and for instilling me with strong values. To my sister, Lynn McAfee, and her family, thank you for all of your encouragement and support. To my children, Cassidy and Nolan, thank you for being such great kids and working so hard in school. Your talents and hard work will pay off. I appreciate you constantly asking me, “Are you done with your book yet, dad?” This question motivated me to keep pressing on. And finally, to my wife, Lori, I could not have done it without you! Thanks for doing more than your fair share and always believing in me!