Re: st: Predict command

["Mary E. Mackesy-Amiti" <mmamiti@uic.edu>]

If something that is significant in the full model becomes 
non-significant in the reduced model that would suggest that that 
"extra" variable somehow modifies the relationship between your 
dependent and independent variables.  Instead of ignoring it you should 
take a closer look and figure out what is going on.  Look up "suppressor 
variables".

Rasika Raghavan wrote:
> All,
>
> I want to fit values to a regression model based on only the
> significant variables. I am aware that I have the option of using only
> the significant varibales in the model , re running the regression and
> then using the predict command. But it is likely that these
> significant variables might become insignificant. Hence I do not want
> to tamper with the model but just predict based on the significant
> variables.Another option would be to output the coefficients and then
> calculate the predicted values through the relevant multiplication and
> additions. Is there but a direct way?
>
> Rasika
> *
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>
>
>   

--
Mary Ellen Mackesy-Amiti, Ph.D.
Research Assistant Professor
Community Outreach Intervention Projects (COIP)
School of Public Health m/c 923
Division of Epidemiology and Biostatistics
University of Illinois at Chicago
ph. 312-355-4892
fax: 312-996-1450

*
*   For searches and help try:
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