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Suggested answer to exercise: Statins in pneumonia, 3

Question 3: What method could be used to calculate "P=0.15" and why?

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Suggested answer

We have two qualitative variables, so we could do either
a chi-squared test or Fisher's exact test.

As the observed frequencies are all pretty large,
the expected frequencies will be too.
We could therefore use a chi-squared test.
We can always use Fisher's exact test and they
should give us the same answer here.

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