Source Coefficient Estimate L* Sum of squares L* Df F-value L* P-value Prob>F L* Coefficient Estimate a*/b* Sum of squares a*/b* F-value a*/b* P-value Prob>F a*/b* Intercept(β0) 40.63         0.90       Model   31.35 5 1.19 0.4016**   0.083 0.93 0.5157** X1(β1) -0.080 0.0388 1 0.0073 0.9344** -0.015 0.00135 0.075 0.7915** X2(β2) -0.065 0.025 1 0.0048 0.9466** -0.001667 0.001655 0.00093 0.9765** X1 X2(β3) -2.69 29.05 1 5.51 0.0512** 0.14 0.073 4.07 0.0833** X12(β4) -0.74 1.50 1 0.28 0.6105** 0.036 0.003655 0.20 0.6650** X22(β5) 0.76 1.59 1 0.30 0.5998** -0.054 0.007941 0.44 0.5266** *Significant; ** not significant; lack of fit is not significant at P value >0.05

Table 3: ANOVA of color L* and a*/b* for the infrared dried tomatoes by response surface quadratic model.