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IV. Resultados y discusión. Capítulo II 173
and on the R 2 adj, which provide a measurement of how much of the
variability in the observed response values could be explained by the
experimental factors and their interactions (Granato et al., 2010). Table 3
summarises the estimated regression coefficients of the second order model
obtained, in which fit parameters from the analysis of variance are included.
Table 3. ANOVA results from the CCD with RSM used in the study adjusted
to a second order equation.
Source
Regression coefficient/Value
Constant 4.864
Glucose -0.304
Fructose -0.662*
Inulin 0.437
Inoculum 1.042**
Glucose x Fructose 0.145*
Fructose x Fructose 0.076*
Fructose x Inoculum 0.099*
Inulin x Inulin -0.076**
Inoculum x Inoculum -0.098**
p-value of lack-of-fit 0.793
R 2 0.73
R 2 -adj 0.61
Standard error of est. 0.153
Mean absolute error 0.079
R 2 = coefficient of determination R 2 -adj = explained variance
*: statistically significant at 90% of confidence level
**: statistically significant at 95% of confidence level