Re: st: Anova

[David Airey <david.airey@vanderbilt.edu>]

This is true for balanced factorial ANOVA, but probably not in your  
complicated model.

For a given variable, why not look at adjusted R^2 with that variable  
(or group of dummies if categorical) in an out of a regression model?

-Dave

On Nov 28, 2008, at 7:08 AM, aapdm wrote:

> Hi,
>
> I am trying to use the anova command but I am not sure I am doing  
> the right thing.
>
> I have a dependent variable Y which I explain by 10 explanatory  
> variables, half of which are categorical while the others are  
> continuous.
>
> When I use the anova command and specify which variables are  
> continuous, then I get a table with the Partial SS for each of the  
> explanatory variables.
>
> If I sum the Partial SS for all variables then this is much smaller  
> than the value reported for the Model SS. How is that the case? What  
> am I missing here?
>
> What I want to is to find to what extent each of the different  
> explanatory variables explains the variance of the dependent  
> variable, which should be given by the ratio between the Partial SS  
> of each variable and the total SS. Am I right?
>
> Many thanks!
>
> Alice.
>
>
>
>
>
>
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