Improvement of Phytase Activity by a New Saccharomyces cerevisiae Strain Using Statistical Optimization

Table 3

Analysis of variance and regression analysis for the optimization of the medium composition for phytase activity by S. cerevisiae in sodium phytate substrate.

Source of variation	Sum of squares	Degrees of freedom	Mean square	𝐹 value
Regression	0.037781	4	0.009445	24.22
Residual	0.002339	6	0.00039
Lack of fit	0.002338	4	0.000585
Pure error	0.000001	2
Total	0.04012	10

Coefficient of determination (𝑅²)=0.9417; 𝐹_4;6;0.05=4.53.