Practice

Practise until it sticks

Choose a topic, a skill or a difficulty. Calculation exercises have new versions with fresh numbers once you have solved them, so you can practise the method rather than memorise an answer.

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Interpretation, difficulty 2 of 3

Interpret a z-score in context

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Among the male finishers of a 10 km race, one runner's time has $z = +2.1$ . The male finish times are roughly bell-shaped. In two or three sentences, interpret this z-score for a club newsletter.