2.6 Statistical analysis
All data presented in this study are the mean ±SD. Mean final pH values
were calculated geometrically. One-way ANOVA was used to test for
significant variation, after homogeneity and normality were satisfied.
Duncan’s and Tukey’s post-hoc tests were used to test for significance
among treatments while percentage data were compared using a
non-parametric Mann–Whitney test. The threshold of statistical
significance was set at P<0.05. The data were analyzed using
SPSS 16.0 (SPSS Inc., Chicago, IL, USA).