Project 14: Findings on how the response variable, paint coat
thickness, depends on a set of six input factors.

Col 1: Level of belt speed.
Col 2: Level of tube width.
Col 3: Level of  pump pressure.
Col 4: Level of paint viscosity.
Col 5: Level of tube height. 
Col 6: Level of heating temperature.
Cols 7-10: Thickness of paint coat (in mm).

-1  -1   1  -1   1   1    1.62  1.49  1.48  1.59
 1  -1   1  -1  -1  -1    1.09  1.12  0.83  0.88
-1   1  -1  -1   1  -1    1.83  1.65  1.71  1.76  
 1   1  -1  -1  -1   1    0.88  1.29  1.04  1.31
-1  -1  -1   1  -1   1    1.46  1.51  1.59  1.40
 1  -1  -1   1   1  -1    0.74  0.98  0.79  0.83
-1   1   1   1  -1  -1    2.05  2.17  2.36  2.12
 1   1   1   1   1   1    1.51  1.46  1.42  1.40