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From |
David Airey <david.airey@vanderbilt.edu> |

To |
"statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |

Subject |
Re: st: Anova |

Date |
Fri, 28 Nov 2008 09:04:28 -0600 |

Sent from my iPhone On Nov 28, 2008, at 8:35 AM, aapdm <aapdm_999@yahoo.co.uk> wrote:

Dear David,Thanks - so are you suggesting that I should regress Y on each ofthe explanatory variables separately and look at the R2 in each case?Thanks, Alice. --- On Fri, 28/11/08, David Airey <david.airey@vanderbilt.edu> wrote:From: David Airey <david.airey@vanderbilt.edu> Subject: Re: st: Anova To: statalist@hsphsun2.harvard.edu Date: Friday, 28 November, 2008, 2:22 PM 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 sureI am doing the right thing.I have a dependent variable Y which I explain by 10explanatory variables, half of which are categorical while the others are continuous.When I use the anova command and specify whichvariables 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 ismuch 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 thedifferent 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. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/* * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/* * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

* * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: Anova***From:*aapdm <aapdm_999@yahoo.co.uk>

**References**:**Re: st: Anova***From:*aapdm <aapdm_999@yahoo.co.uk>

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