Reading an experiment
What randomisation buys you, what a control group is for, and the ways a real A/B test goes wrong before anyone looks at the numbers.
We mark it against a checklist you can read first
What counts as knowing this
Judge whether an experiment's design supports the conclusion drawn from it
A check for this one skill
Up to 2 questions on this skill alone, marked against the bar beside this. It stops as soon as the answer is clear. No account, and your answers are not kept.
You'll need these first
Helpful, but not required
Start on Statistics & Data Literacy
Every skill above, ordered by what depends on what, with the projects above that as the evidence you actually did it. We work out where you already are first, so the path skips what you can do.
Start this path