David Petry wrote:
>
> Keep in mind that correlation is not the same as causation.
>
> That's of particular importance in a study like this one.
>
> That is, if people are taking marijuana to treat pain and
> general discomfort, and if heart attacks are preceded by
> pain and discomfort, then there will be a strong correlation
> between marijuana use and later heart attacks, but it
> won't be proof of causation.
I know the study is flawed in ever so many ways. I just want
to get at the statistical implications. I wish I hadn't
memtioned marijuana or the trial.
Please help me to find the appropriate statistical test
(e.g. two-tailed t-test, Spearman Rank correlation, chi2
test or whatever) and help me work out the statistical
significance of any correlation between events A and B
where:
In 1086240 trials, A happened in 17484 of them, B happened
in 124 and both A and B happened in 9.
Is there a statistical association between A and B? How
significant is that association? I would be ever so grateful
if someone could help.
Take care,
Paul
All About MS - the latest MS News and Views
http://www.mult-sclerosis.org/
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