RPD -- Example 4.2 -- Y=Yield, X=Ozone

                SSTOTALU      SSMU  SSTOTALC     SSREG   SSRESID

                  208495 207480.25   1014.75 799.13814 215.61186


                           BETAHAT S2BETAHAT

                         253.43396 115.94223 -1017.037
                          -293.531 -1017.037 11623.281