Date: Fri, 11 Feb 2011 09:13:20 -0500
From: Jonathan Hughes <jonathan.hughes.10 at live.com>
To: <r-sig-ecology at r-project.org>
Subject: [R-sig-eco] quick stats question
Message-ID: <COL112-W6293459ECC7C9034F97585BFEF0 at phx.gbl>
Content-Type: text/plain
Dear all,
This is both an R and a statistics question. I want to test whether males and females of a given species tend to co-occur in a given sampling unit more frequently than expected by chance. I'm thinking about using a binomial distribution with p as the sex ratio of the entire population. So, even though the population sex ratio is close to 50:50, each sampling unit would have disproportionately more males than females. Given that the test is not about p per se, how would you go about testing this hypothesis?
Thanks!
Jonathan