Sources
Free videos, books and apps, each opened and checked on the date shown.
- Seeing Theory, created at Brown UniversityInteractive visual introduction to probability and statistics, six chapters from basic probability to regressionConceptsChecked Sep 16, 2026
- OpenIntro Statistics, 4th editionFull textbook, free as a PDF, used from community colleges to Ivy League schoolsConceptsChecked Sep 16, 2026
- Introductory Statistics 2e, OpenStaxFree open textbook with practice problemsConceptsChecked Sep 16, 2026
- STAT 200 Elementary Statistics, Penn StateFree course notes that cover the first half of an intro courseConceptsChecked Sep 16, 2026
- STAT 501 Regression Methods, Penn StateFree regression notes with worked examples, the best match for the regression halfConceptsChecked Sep 16, 2026
- 18.05 Introduction to Probability and Statistics, MIT OpenCourseWare, Spring 2022Lecture notes, problem sets with solutions, and R tutorialsConceptsChecked Sep 16, 2026
- NIST/SEMATECH e-Handbook of Statistical MethodsGovernment reference for checking how a method works and when to use itConceptsChecked Sep 16, 2026
- Statistics and Probability, Khan AcademyShort videos and practice sets for any topic that does not clickConceptsChecked Sep 16, 2026
The CRAN site blocked the automated check, so An Introduction to R was confirmed through CRAN's own listing in search results rather than by opening the page.