Run z1       z2       z3       z4       Yield   PCE
  1  1        1        1        1        27.6  43.8
  2 -1       -1        1        1        16.6  27.2
  3  1       -1       -1        1        15.4  23.6
  4 -1        1       -1        1        17.4  26.2
  5  1       -1        1       -1        17.0  27.8
  6 -1        1        1       -1        19.0  30.2
  7  1        1       -1       -1        17.4  25.2
  8 -1       -1       -1       -1        12.6  18.8
  9  1       -1        1        1        18.6  28.8
 10 -1        1        1        1        22.4  36.8
 11  1        1       -1        1        21.4  33.4
 12 -1       -1       -1        1        14.0  21.0
 13  1        1        1       -1        24.0  38.0
 14 -1       -1        1       -1        15.6  23.6
 15  1       -1       -1       -1        13.0  20.2
 16 -1        1       -1       -1        14.4  22.6
 17  0        0        0        0        22.6   .
 18  1.41421  0        0        0        23.4   .
 19 -1.41421  0        0        0        20.6   .
 20  0        1.41421  0        0        22.6   .
 21  0       -1.41421  0        0        13.4   .
 22  0        0        1.41421  0        20.6   .
 23  0        0       -1.41421  0        15.6   .
 24  0        0        0        1.41421  21.0   .
 25  0        0        0       -1.41421  17.6   .