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Statistics & probability

Learn to describe data, compute probabilities and draw conclusions with statistics, one of the most useful tools in science.

29 free sites · 24 in English.

1. Khan Academy – Statistics and probability English khanacademy.org

   Full course with videos and exercises.

   For: Middle & high schoolCollege

2. OpenStax – Introductory Statistics 2e English openstax.org

   Free college textbook.

   For: College

3. OpenIntro Statistics English openintro.org

   Free textbook widely used in universities.

   For: College

4. Online Statistics Education (Rice) English onlinestatbook.com

   Multimedia introductory statistics course.

   For: College

5. Penn State – STAT Online English online.stat.psu.edu

   Open course notes from Penn State’s statistics program.

   For: College

6. Harvard Stat 110 – Probability English projects.iq.harvard.edu

   Joe Blitzstein’s probability course with videos.

   For: College

7. MIT OCW – 18.05 Probability and Statistics English ocw.mit.edu

   Complete MIT course.

   For: College

8. Introduction to Probability (Grinstead & Snell) English math.dartmouth.edu

   Free probability textbook from Dartmouth.

   For: College

9. Probability Course (Pishro-Nik) English probabilitycourse.com

   Online book on probability and random processes.

   For: College

10. Think Stats English allendowney.github.io

    Exploratory data analysis with Python.

    For: College

11. R for Data Science (2e) English r4ds.hadley.nz

    Free book on data analysis with R.

    For: CollegeGeneral public

12. StatQuest (YouTube) English youtube.com

    Statistics and machine learning, clearly explained.

    For: CollegeGeneral public

13. Statistics How To English statisticshowto.com

    Step-by-step explanations of statistical concepts.

    For: College

14. Seeing Theory (Brown University) Multilingual seeing-theory.brown.edu

    A visual introduction to probability and statistics.

    For: College

15. jamovi Multilingual jamovi.org

    Free, easy statistics software.

    For: College

16. JASP Multilingual jasp-stats.org

    Free statistics software with a friendly interface.

    For: College

17. Our World in Data English ourworldindata.org

    Real data about the world to practice with.

    For: College

18. Gapminder English gapminder.org

    Charts and tools to understand global data.

    For: College

19. Data.gov English data.gov

    Hundreds of thousands of open U.S. government datasets.

    For: College

20. Kaggle Datasets English kaggle.com

    Open datasets on every topic.

    For: General publicCollege

21. Introduction to Modern Statistics (OpenIntro) English openintro-ims.netlify.app

    Free modern intro textbook.

    For: College

22. Learning Statistics with R English learningstatisticswithr.com

    Free book by Danielle Navarro.

    For: College

23. Statistical Thinking for the 21st Century English statsthinking21.org

    Free book by Russell Poldrack.

    For: College

24. Bayes Rules! English bayesrulesbook.com

    Free introduction to Bayesian statistics.

    For: College

25. NIST/SEMATECH e-Handbook of Statistical Methods English itl.nist.gov

    Practical statistics reference from NIST.

    For: CollegeGeneral public

26. Khan Academy – AP Statistics English khanacademy.org

    AP-level course with practice.

    For: Middle & high schoolCollege

27. Statistical Rethinking (lectures) English github.com

    Richard McElreath’s free Bayesian lectures.

    For: CollegeAdvanced

28. The R Project Multilingual r-project.org

    Free, open-source statistics language.

    For: College

29. GNU PSPP Multilingual gnu.org

    Free alternative to SPSS.

    For: College