Practice · Statistics Quest

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

What the tutoring data show

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Tutored students scored about 5 points lower on the exam, but they had started about 12.6 points lower on the previous year's test, and within every prior-score band tutored students scored higher. Which conclusion is best supported?