highly significantp < 0.0001
Among the linear terms, only extraction time (X 2 ) was significant ( p < 0.0001), while all interaction (X1X2, X1X3, X2X3) and quadratic (X12, X22, X32) terms were highly significant ( p < 0.0001).
Among the linear terms, only extraction time (X 2 ) was significant ( p < 0.0001), while all interaction (X1X2, X1X3, X2X3) and quadratic (X12, X22, X32) terms were highly significant ( p < 0.0001).