[R] Comparing proportions between groups

[Richard Cotton]

Lila86 wrote:
> 
> I have two groups (men and women) and I know per group how many of them
> smoke or don't smoke (women 40 of 200; men 100 of 300). I would like to
> know how I can compare in R if men and women differ significantly in their
> smoking.  However, because there are more men in the sample than women I
> cannot just compare the number of smokers and non-smokers in both groups,
> right?! (I would not really know how to do that either, to be honest :(). 
> 

Read up on contingency tables, and take a look at ?chisq.test.

-----
Regards,
Richie.

Mathematical Sciences Unit
HSL
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