highly significantp < 0.01
From the analysis of variance ( Table 3 ), the model for amylase was highly significant ( p < 0.01) and the R 2 (determination coefficient) value for the model, being the measure of the goodness of fit of the model, was 0.8405 which showed that 84.05% of the total variation in the observed response value could be explained by the model, or by experimental parameters and their interactions.