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Re: st: Chi-square test for Categorical Data Analysis

From   "Hugh Colaco" <[email protected]>
To   [email protected]
Subject   Re: st: Chi-square test for Categorical Data Analysis
Date   Tue, 18 Sep 2007 17:30:39 -0400

Austin and Maarten,

Thanks for your help. I would like to point out that income is a
categorical variable ranging from 1 to 7 (in ascending order), and
participants had to simply choose the number associated with the
income range. In other words, I do not have a precise dollar income
value for any participant.


On 9/18/07, Austin Nichols <[email protected]> wrote:
> Maarten--
> While -intreg- does seem tailor-made in some ways for this problem of
> testing whether e.g. E(Y|X=A)>E(Y|X=B) when Y is discretized as Y*
> (measured in large intervals), by simply typing e.g.
>    intreg ystar groupA
> the assumption in -intreg- is that e (or Y-bX) is N(0,s) which seems
> unlikely to hold true for incomes measured in dollars.
> On 9/18/07, Maarten buis <[email protected]> wrote:
> > You lose information that way, and if you just want to test, why not do
> > that on the whole distribution? More interesting would be to use
> > -intreg- as this command was specifically designed for this case.
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