highly significantP < 0.01
Specifically, it shows that the quadratic terms for the factors X 1 2 , X 2 2 , X 3 2 all have a highly significant impact on PHBHHx concentration at a 99% probability level ( P < 0.01).
Specifically, it shows that the quadratic terms for the factors X 1 2 , X 2 2 , X 3 2 all have a highly significant impact on PHBHHx concentration at a 99% probability level ( P < 0.01).