OpenIntro Statistics, David M. Diez, Christopher D. Barr, and Mine Çetinkaya-Rundel, 2023 (OpenIntro) - A comprehensive and freely available textbook covering fundamental statistical concepts, including descriptive statistics, central tendency, and variability.
Introduction to Probability and Statistics (MIT OpenCourseWare 18.05), Jeremy Orloff, Jonathan Bloom, 2014 (MIT OpenCourseWare) - Provides a structured, university-level introduction to core statistical concepts, including summary statistics, suitable for an academic foundation.
An Introduction to Statistical Learning with Applications in Python, Gareth James, Daniela Witten, Trevor Hastie, Rob Tibshirani, Jonathan Taylor, 2023 (Springer) - A highly regarded resource that introduces statistical learning techniques, with foundational chapters on descriptive statistics and data analysis, now with Python applications.