highly significantP value < 0.005
The linear effect ( X 1 ), squared effect ( X 1 2 ) as well as interactive effect ( X 1 X 2 ) were highly significant ( P value < 0.005).
The linear effect ( X 1 ), squared effect ( X 1 2 ) as well as interactive effect ( X 1 X 2 ) were highly significant ( P value < 0.005).