Proc Reg; How to predict new observation?

[Jolly]

Hello,

I was wondering, how in the Proc Reg procedure can you simply predict a value, with a prediction interval, for a new observation?  Such as, you run proc reg and get the regrssion equation, then I want to calculate the predicted value and prediction interval when x=5.5.

I am using SAS 9.4

proc reg data=regression;

model y= x

run;

Thank you,
Jeff S. O.

[ballardw · Accepted solution]

Easiest is often to include X (predictor) value(s) of interest with missing for the dependent variables.

Then either options on the Model Statement or create an output set:

Output out=want p=Ypredicted LCL=ylowerin LCLM=ylowermean UCL=yupperin UCLM=yuppermean;

Ypredicted would be the associated Predicted Y for any X, including the ones with missing Y, the LCL and LCLM do lower confidence limits for single obs or the mean and UCL UCLM for the upper.

[Jolly]

Thank you!

[Reeza]

Look at Proc Score. 

A quick and dirty method is to include the values in your original dataset but leave the dependent variable blank/missing. 

Then use the output statement with the p= option to get the predicted values out. 

[sbxkoenk]

To deploy a PROC REG model on new data , Look at PROC SCORE.

SAS/STAT(R) 14.1 User's Guide

The SCORE Procedure

Example 100.2 Regression Parameter Estimates

http://support.sas.com/documentation/cdl/en/statug/68162/HTML/default/viewer.htm#statug_score_exampl...

See also:

Usage Note 33307: Scoring (computing predicted values) for new observations or a validation data set

http://support.sas.com/kb/33/307.html

Koen