highly significantP < 0.01
The significance test shows that A, C, A 2 , B 2 , and C 2 have highly significant effects on SPP yield ( P < 0.01), while the other terms have insignificant effects.
The significance test shows that A, C, A 2 , B 2 , and C 2 have highly significant effects on SPP yield ( P < 0.01), while the other terms have insignificant effects.