* The Response Surface with Split-Plot;

data design;



batch     a     b     c     d     y     aa

------------------------------------------

   1      1     1     1     1    505     1

   1      1    -1    -1    -1    493     1

   1      1    -1     1    -1    491     1

   2      1     1    -1     0    498     1

   2      1     1    -1    -1    504     1

   2      1    -1     1     0    500     1

   3     -1     0    -1    -1    494    -1

   3     -1     0     1     0    498    -1

   3     -1    -1     0     1    498    -1

   4      0    -1    -1     0    496     0

   4      0     0     1     1    503     0

   4      0    -1     0    -1    496     0

   5     -1    -1     1     1    503    -1

   5     -1     1     1    -1    495    -1

   5     -1    -1     1    -1    494    -1

   6      0     0     0     0    486     0

   6      0     1     1    -1    501     0

   6      0     1    -1     1    490     0

   7     -1     1     0     0    494    -1

   7     -1     1     1     1    497    -1

   7     -1    -1     1    -1    492    -1

   8      1    -1     1     1    503     1

   8      1     0     0    -1    499     1

   8      1     0    -1     1    493     1

   9      1     1     1    -1    505     1

   9      1     1     0     1    500     1

   9      1    -1    -1     1    490     1

  10     -1    -1    -1     1    494    -1

  10     -1     1    -1    -1    497    -1

  10     -1    -1    -1    -1    495    -1