The regression coefficients from the second order equations for
eachdependent variable canbe observedinTable 3, along withtheir
corresponding p, F (calculated and tabulated) and R2 values. The
analysis of variance (ANOVA) at the 95% confidence level implied
that tensile strength (TS) presented calculated F values lower than
the tabulated values, as well as a low R2 value, meaning that, for
the studied range, the model was not able to explain the quadratic
data behavior. All other parameters were statistically significant,
with high coefficient of determination (Fc > Ft; R2 ≥ 0.88; p < 0.05).
The regression coefficients from the second order equations foreachdependent variable canbe observedinTable 3, along withtheircorresponding p, F (calculated and tabulated) and R2 values. Theanalysis of variance (ANOVA) at the 95% confidence level impliedthat tensile strength (TS) presented calculated F values lower thanthe tabulated values, as well as a low R2 value, meaning that, forthe studied range, the model was not able to explain the quadraticdata behavior. All other parameters were statistically significant,with high coefficient of determination (Fc > Ft; R2 ≥ 0.88; p < 0.05).
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