highly significantp < 0.01
According to the ANOVA results in Table 2 , the regression model is highly significant ( p < 0.01), and the lack of fit is not significant ( p = 0.4553 > 0.05), thus confirming the validity of the quadratic model.
According to the ANOVA results in Table 2 , the regression model is highly significant ( p < 0.01), and the lack of fit is not significant ( p = 0.4553 > 0.05), thus confirming the validity of the quadratic model.