Statistics Quest

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

Which evidence is strongest?

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A school district wants to know whether a reading app improves Grade-4 reading scores. Which piece of evidence would most strongly support a causal claim?

Choose one