Table 11: Model terms in RSM for copper.

TermStandard errorVIFRi2Power (%)

A0.353610.000069.8
B0.353610.000069.8
C0.353610.000069.8
AB0.500010.000042.1
AC0.500010.000042.1
BC0.500010.000042.1
A20.47871.018520.018295.4
B20.47871.018520.018295.4
C20.47871.018520.018295.4