Study on Proportion Optimization of Magnesium Oxychloride Cement-Stabilized Clayey Soil Based on the Response Surface Methodology

Table 7

Analysis of variance for regression models of unconfined compressive strength.

Source	Sum of squares	F value	value
Model	2.40	281.5	<0.0001
X 1	0.065	68.51	0.0002
X 2	2.19	2320.19	<0.0001
X 3	0.038	39.98	0.0007
	0.044	46.63	0.0005
	0.042	44.43	0.0006
	2.025 × 10^−3	2.14	0.1937
X 1X 2	3.025 × 10^−3	3.20	0.1239
X 1X 3	2.500 × 10^−5	0.026	0.8762
X 2X 3	8.100 × 10^−3	8.56	0.0264
Adjusted R^2 = 0.9941; predicted R^2 = 0.9705