Coded values Experimental % Predicted % Design X1 X2 X3 WL WR SG WL WR SG 1 0 0 0 21.91 8.57 7.15 23.07 7.67 8.00 2 1 -1 -1 20.88 8.07 8.81 23.07 7.67 8.00 3 -1 -1 1 24.01 11.52 12.48 22.95 13.69 10.13 4 0 0 0 23.55 10.71 12.84 22.95 13.69 10.13 5 1 -1 -1 26.93 16.16 11.78 28.64 18.06 11.42 6 0 0 2 27.97 16.86 11.11 28.64 18.06 11.42 7 1 -1 1 31.44 17.92 13.51 32.12 19.64 17.28 8 -1 1 -1 26.44 14.15 20.29 32.12 19.64 17.28 9 2 0 0 29.91 10.17 13.73 28.56 8.68 12.65 10 1 1 -1 28.91 10.97 13.48 28.56 8.68 12.65 11 0 0 -2 26.44 14.15 20.29 29.22 14.45 19.99 12 -2 0 0 29.72 14.41 20.80 29.22 14.45 19.99 13 0 2 0 28.66 23.37 9.29 30.70 22.68 10.46 14 -1 1 1 26.43 23.70 7.73 30.70 22.68 10.46 15 0 0 2 34.15 23.30 22.81 34.96 24.01 21.52 16 -1 -1 -1 34.46 19.99 21.42 34.96 24.01 21.52 17 1 1 1 29.24 7.91 10.32 28.32 9.90 9.33 18 -1 1 -1 31.31 8.05 10.09 28.31 9.90 9.33 19 0 0 -2 36.56 20.83 20.82 31.80 16.08 20.43 20 1 1 -1 29.72 20.04 16.67 31.80 16.08 20.43 21 0 -2 0 20.89 7.91 5.99 21.10 8.52 8.93 22 -1 -1 -1 20.42 7.71 7.66 21.10 8.52 8.93 23 0 -2 0 33.17 28.26 15.91 30.61 25.30 13.10 24 -1 -1 1 35.52 28.63 12.89 30.61 25.30 13.10 25 -1 1 1 30.53 20.74 13.80 27.26 16.59 12.27 26 0 2 0 27.65 19.21 8.74 27.26 16.59 12.27 27 1 -1 1 34.94 19.20 15.75 34.27 21.11 19.76 28 1 1 1 36.23 21.12 24.15 34.27 21.11 19.76 29 2 0 0 30.75 15.85 14.89 30.83 18.49 14.60 30 -2 0 0 29.78 20.30 14.58 30.83 18.49 14.60

Table 3: Experimental condition and observed respond values of CCD.