Date:         Fri, 22 Mar 1996 17:42:48 GMT
Reply-To:     cepotter <cepotter@CCS.CARLETON.CA>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         cepotter <cepotter@CCS.CARLETON.CA>
Organization: Carleton University
Subject:      Re: Validating a multiple regression model

cepotter (cepotter@ccs.carleton.ca) wrote:
 
> Does any one know how to get SAS to generate predicted values and
> associated confidence intervals for "future observations"?
 
> I am a biology graduate student at Carleton U, working on my Masters
> Thesis in ecology.  I have a 5 term regression model generated from 100
> observations.  I have 50 other observations which I held back, when
> constructing the model.  I now need to determine the validating of the model
> through its ability to predict the remaining 50 observations.  I can plug
> the parameter estimate co-efficients with the predictor values for the 50
> observations into an excell spreadsheet and come up with the predicted
> values but not confidence intervals for those predicted values to see if
> the cooresponding observed values fit into the confidence range.
 
> All the other students in my lab are stumped, we can find complex
> equations in regression text books, but cannot find the programming
> statements in the SAS manual----perhaps we do not know the proper "buzz
> words" or are not being create enough in navigating the index.
 
> HELP HELP HELP
 
> Carol