Zaragoza Alvarado, Guillermo Alejandro. “Chapter 1. What Is Statistics For and Why Should You Learn It?”. In Descriptive Statistics Manual. Definition and Exercises, 24–27. AG Editor, 2025. Accessed December 10, 2025. https://books.ageditor.org/index.php/books/catalog/book/978-628-97230-1-4/chapter/12.