Table 6: Analysis of variance (ANOVA) of main effects of factors. 
 Source  Sum of squares  df  Fvalue  P value Prob > F 
 Model  227.24  12  58.97  0.0032 significant  Initial pH  79.41  3  82.44  0.0022  Moisture content (mL)  20.03  3  20.79  0.0165  Weight of grape fruit (%)  112.84  3  117.14  0.0013  Weight of waste (g)  14.96  3  15.53  0.0248  Residual  0.96  3    Cor Total  228.20  15   


Std. Dev. 0.57; Mean = 5.04; C.V.% = 11.25; PRESS = 27.40; = 0.9958; Adj = 0.9789; Pred = 0.8799; Adeq Precision = 26.597.
