Source Coefficient of estimation Sum of squares DF Mean squares f-value p-value prob>f Model 30.83 455.26 9 50.58 6.27 0.0003* X1 1.03 29.19 1 29.19 3.62 0.0717 X2 2.83 218.24 1 218.24 27.04 <0.0001 X3 2.08 118.54 1 118.54 14.69 0.0010 X12 -0.27 0.90 1 0.90 0.11 0.7422 X12 -1.76 37.42 1 37.42 4.64 0.0437 X12 -0.021 5.559E-003 1 5.559E-003 6.886E-004 0.9793 X1 X2 0.90 12.96 1 12.96 1.61 0.2197 X1 X3 0.19 0.60 1 0.60 0.075 0.7875 X2 X3 -0.86 11.75 1 11.75 1.46 0.2418 Residual   161.44 20 8.07     Lack of Fit   106.27 5 21.25 5.78 0.0036* Pure error   55.17 15 3.68     Corrected Total   616.69 29       Std. Dev   2.84         R2   0.7382         Adj R2   0.6204         Pred. R2   0.4315         Adeq. Precision   8.447         CV%   9.81         DF – Degrees of Freedom, *- 5% level of significant

Table 4: ANOVA for response surface quadratic model for osmotic dehydration of pineapple- water loss.