Dataset:  distillery_cod.dat

Source: R.K. Prasad and S.N. Srivastava (2009). "Electrochemical
Degradation of Distillery Spent Wash Using Catalytic Anode: Factorial 
Design of Experiments," Chemical Engineering Journal, Vol. 146, pp. 22-29.

Description: 2^4 Full Factorial assessing effecst of factors on chemical
oxygen demand (COD) removal. Factors: Current Density, Dilution, Time, pH.

Variables/Columns
Run #    7-8
Coded Current Density  15-16   /* -1=14.285 mA/cm^2  +1=42.857  */
Coded dilution percent   23-24  /* -1=10  +1=30  */
Coded time in hours   31-32   /* -1 =2, +1=5  */
Coded pH   39-40   /* -1=4, +1=9  */
Current density  43-48
Dilution percent   55-56
Time            64
pH             72
% COD Removal   74-80