Brown University
Brown University: Seeing Theory
This resource provides interactive visualizations of probability concepts. Covers basic probability, compound probability, probability distributions, frequentist inference, Bayesian inference, and regression analysis. The authors are...
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Using English: English Language Quizzes
Over 200 short self-quizzes for English learners at beginner and intermediate levels. Quizzes span topics including spelling, grammar, vocabulary, and punctuation.