Introductory Statistics
by Neil A. Weiss, Matthew J. Hassett · Neil A. Weiss
A college textbook working through data description, probability, sampling distributions, estimation, and hypothesis testing with step-by-step procedures and Minitab examples. Covers the standard one-semester sequence, so readers can construct confidence intervals and interpret significance tests.
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seeing-theory.brown.edu
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Short animated explainer distinguishing nominal, ordinal, interval and ratio measurement scales with everyday examples. After watching you can classify a variable by its level of measurement and tell which summary statistics and graphs are legitimate for it.
Statistics
Learn statistics fundamentals with this free course from Khan Academy! Master probability, data analysis, and more.