/*-----------------------------------------------------------------
            S A S   S A M P L E   L I B R A R Y                   
                                                                  
      NAME: regex6                                                
     TITLE: Example 6 for PROC REG                                
      DATA: Reaction                                              
   PRODUCT: STAT                                                  
    SYSTEM: ALL                                                   
      KEYS: Lack-of-fit test                                      
     PROCS: REG                                                   
                                                                  
   SUPPORT: Robert Cohen                                          
-----------------------------------------------------------------*/
data reaction;
   input FeedRate Catalyst AgitRate Temperature
         Concentration ReactionPercentage;
   datalines;
10.0   1.0  100   140  6.0   37.5
10.0   1.0  120   180  3.0   28.5
10.0   2.0  100   180  3.0   40.4
10.0   2.0  120   140  6.0   48.2
15.0   1.0  100   180  6.0   50.7
15.0   1.0  120   140  3.0   28.9
15.0   2.0  100   140  3.0   43.5
15.0   2.0  120   180  6.0   64.5
12.5   1.5  110   160  4.5   39.0
12.5   1.5  110   160  4.5   40.3
12.5   1.5  110   160  4.5   38.7
12.5   1.5  110   160  4.5   39.7
;
proc reg data=reaction;
   model  ReactionPercentage=FeedRate Catalyst AgitRate
                             Temperature Concentration / lackfit;
run;