ANOVA showed that the fitted models were suitable showing significant
regression, low residual values, no lack of fit with satisfactory
determination coefficients (R2) of 0.9717, 0.9374, 0.9678 and 0.9919
for the responses viz process yield, moisture content, hygroscopicity
andwater solubility respectively. Table 3 shows second order regression
coefficients for process yield, moisture content, hygroscopicity and
solubility.
The graphical representation for each response was developed