Head First Statistics
by Dawn Griffiths · Griffiths
An illustrated O'Reilly introduction covering probability, distributions, correlation, and hypothesis testing through puzzles and worked scenarios. Readers finish able to summarize data with means and spread, compute probabilities, and run basic significance tests by hand.
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More resources on Descriptive Statistics
Distill.pub
Peer-reviewed web journal of machine learning explanations, publishing interactive articles on topics like feature visualisation, attention and neural network interpretability. Archive remains readable, though the journal went on indefinite hiatus in 2021 and no longer publishes.
stattrek.com
StatTrek is an online statistics resource that provides clear tutorials and explanations of probability and statistics. It also features free calculators for distributions, hypothesis tests, confidence intervals, and other statistical methods.
Wolfram MathWorld
MathWorld is an online mathematics encyclopedia from Wolfram Research offering detailed, browsable articles on topics across the math spectrum, including algebra, geometry, calculus, and number theory. Each entry includes definitions, theorems, formulas, diagrams, worked examples, and links to further reading.
seeing-theory.brown.edu
Seeing Theory is an interactive, browser-based resource from Brown University that uses visual simulations to explain fundamental probability and statistics concepts. It offers interactive demos and explanations on topics like probability, distributions, sampling, the central limit theorem, confidence intervals, hypothesis testing, and Bayesian reasoning.
Types of Data: Nominal, Ordinal, Interval/Ratio - Statistics Help
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.