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Suggested answer to exercise: Significance tests, 1

Question 1: What is meant by ‘P<0.01’?

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Suggested answer

P is the probability of a difference in attendance with croup
as large as that observed in the sample, if the null hypothesis were true,
i.e. if in the whole population of patients there were no difference in
attendance between children given dexamethasone and children given placebo.

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Last updated: 27 July, 2009.

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