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 3 of 3

Generalise or explain?

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A university randomly selects 1,000 of its 30,000 students and asks how many hours they study per week and what their grade average is. Students who study more have higher grades. Which conclusion is justified?

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