Learn statistics by doing it.
17 courses take you from “what is a mean” to clustering, decision trees and model evaluation — all inside Excel, the tool you already have. Every lesson comes with a lab you work through in the browser: you type the formula, you see the number, the server tells you whether it is right.
The first course is free in full — lessons, labs, final exam and the certificate. No card, no trial clock.
A real spreadsheet in the page, with real data. Write
=STDEV.S(B2:B21), get the number, get told if it is the right one.
126 labs so far.
Assumptions, when a test breaks, what a p-value really says. The maths is explained, then done — with the exact Excel function that does it.
Pass the final exam and get a certificate with a public verification link and a PDF — one for every course you finish.
Excel is not R. We say where the line is.
Most of what a working analyst does — describing data, testing a difference, fitting and checking a regression, forecasting, clustering, evaluating a classifier — Excel does perfectly well, and these courses show exactly how. Where Excel needs the Analysis ToolPak, Power Query or Solver, the lesson names it. Where Excel genuinely runs out (random forests, mixed models, millions of rows), the lesson says so instead of faking it, and tells you what the next tool would be.
17 courses, in order
17 courses · 136 lessons · one certificate each
Start with the free course.
If it teaches you something you can use tomorrow, the rest are waiting.
Open Data Foundations