extremely significantP < 0.0001
The regression model of PHWE-PTXP yield was extremely significant ( P < 0.0001), the correlation coefficient ( R 2 ) was 0.9696 and the lack of fit had no significant effect ( P > 0.05).
The regression model of PHWE-PTXP yield was extremely significant ( P < 0.0001), the correlation coefficient ( R 2 ) was 0.9696 and the lack of fit had no significant effect ( P > 0.05).