Statistics, taught and computed
Statistics you can read and run.
Every Statohub page does two jobs: a clear, example-led explanation of the concept, and a calculator that works the moment you need it.
Standard deviation
It measures how spread out a set of numbers is around their mean. A small value means the data clusters tightly; a large value means it's scattered widely.
For a full population you divide by n; for a sample, by n-1.
σ = √( Σ(xᵢ − μ)² / n )Explore by topic
Six paths through statistics
Each topic is a hub of guides and tools - start at the pillar and follow the links wherever your question leads.
Descriptive Statistics
Core summaries for describing datasets, including center, spread, and shape.
Probability & Distributions
Probability rules and the distributions that describe random outcomes.
Combinatorics
Counting methods for permutations, combinations, factorials, and outcomes.
Regression & Correlation
Relationships between variables, lines of best fit, and correlation measures.
Inferential Statistics
Hypothesis tests, confidence intervals, p-values, and sample-based conclusions.
Foundations
Core notation, vocabulary, and concepts for learning statistics.
Tools
Popular calculators
Standalone tools for when you already know the concept and just need the answer.
The Statohub idea
Most sites teach or compute. We do both, on the same page.
Calculator sites give you a number with no understanding. Textbook sites explain without a tool in sight. Statohub puts the explanation and the calculator side by side - so the method makes sense and the answer is one click away.
Read the concept
A plain-English explanation with a worked example - no wall of notation.
Run your own numbers
The matching calculator is embedded right there. Swap in your data and see it work.
Follow the thread
Every page links to the next idea, so one question naturally leads to the next.