Summarising a distribution
Mean, median and spread, and choosing between them by looking at the shape rather than by habit. A mean reported for a skewed distribution is not wrong so much as misleading.
We mark it against a checklist you can read first
What counts as knowing this
Choose a summary statistic that fits the distribution's shape and say why the other would mislead
A check for this one skill
Up to 3 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.
Where it sits
What it unlocks
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.
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