Table 10 Coefficient of correlation.

From: Optimization studies of stir casting parameters and mechanical properties of TiO2 reinforced Al 7075 composite using response surface methodology

Parameters

R2 (%)

R2 (adj) (%)

R2 (pred) (%)

ð R2 (%)

Ultimate tensile strength

97.75

96.57

93.51

< 20

Hardness

94.76

93.72

91.83

< 20

Impact strength

95.90

94.54

92.02

< 20

Elastic modulus

96.36

95.42

93.74

< 20

Compressive strength

97.39

96.46

94.18

< 20

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