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Re: st: Measure of Variability in a Nominal Variable
Agresti wrote (at least) two books on categorical data and there are
several statistics similar to the one you describe (though it is not
a probability, as Maarten pointed out. So... which book and which
statistic?
-Steven
On Mar 3, 2008, at 5:52 PM, Maarten buis wrote:
--- Kevin Daley <[email protected]> wrote:
I would like to use a statistic discussed by Agresti in his
categorical data analysis book that gives the probability that two
randomly selected independent observations in a given dataset will
end up in different categories of the given variable. The
statistic has a minimum value of 0 and a maximum value of J-1.
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