Learn the concept.
Run the numbers.
Statohub is a study companion for statistics: plain-spoken guides, paired with a working calculator wherever a calculation helps, so the method and the answer stay close together.
The handbook
Six areas of statistics, each a growing shelf of guides with the tools to apply them.
Descriptive Statistics
Core summaries for describing datasets: mean, median, and mode for center; variance, standard deviation, and range for spread; and skewness for shape.
Probability & Distributions
Probability rules, from single events to conditional probability, plus the normal, binomial, and Poisson distributions that model random outcomes.
Regression & Correlation
How variables relate to each other: correlation coefficients, lines of best fit, and linear regression for measuring an association's strength.
Inferential Statistics
Hypothesis tests, confidence intervals, p-values, and the reasoning for drawing conclusions about a population from a limited sample.
Foundations
Core notation, vocabulary, and concepts for learning statistics, covering populations versus samples, variable types, and summation notation.
Calculators
Every tool on the site in one hub: fast, free, and explained.
Tools that show their working
Most calculators give you a number and nothing else. Ours sit beside the explanation, so you can check the method as you go.
Browse calculators