Hyperstat

HyperStat is a free, web-based statistics textbook and reference designed to provide a concise, intuitive introduction to statistical methods. It is written and maintained to be accessible without subscription or login, emphasizing conceptual understanding and practical application through plain-language explanations and worked examples.

Content and scope: HyperStat covers a wide range of topics typical of introductory and intermediate statistics courses. Major sections include descriptive statistics, probability, common distributions, sampling and estimation, confidence intervals, hypothesis testing, t-tests and ANOVA, correlation and linear regression, multiple regression, chi-square tests, nonparametric methods, and power analysis. Each topic is presented with definitions, formulas, example computations, and interpretations aimed at real data scenarios.

Structure and usage: The site is organized into modular chapters that readers can navigate as needed, making it suitable as a course supplement or for self-study. It is valued for its compact explanations, visual aids, and emphasis on intuition over mathematical formalism. Instructors often cite HyperStat as a quick reference for standard statistical concepts and for linking theory to practice.

Impact and reception: HyperStat is widely used in introductory statistics education, especially in psychology and social sciences, as an open educational resource. It complements textbooks and software tools, helping learners build a foundation before delving into more advanced methods. The project continues to be updated to reflect standard statistical practices and new educational approaches.