Source Water activity Moisture RPC DF MS F DF MS F DF MS F Regression 4 0.01 15.78 2 8.47 28.07 4 412.46 17.44 Residual 12 0.00   14 0.30   12 23.64   Lack of fit 10 0.00   12 0.31   10 27.05   Pure error 2 0.00   2 0.22   2 6.57   TOTAL 16     16     16     R2 0.83     0.80     0.86     NS: Not significant DF: degree of freedom MS: mean square *Significant at 5% level

Table 5: Analysis of variance for water activity, moisture and retention of phenolic compounds (RPC) in regression models of sonication treatment.