Experimental Evaluation of Multiple Frost Heaving Parameters for Preflawed Granite in Beizhan Iron Mining, Xinjiang, China

Table 3

Comparison of statistical models to choose the best RSM model for frost heaving force.

Source	Sum of squares	df	Mean square	value	value	Fitness of the model
Mean vs. total	2620.291	1	2620.291
Linear vs. mean	172.7944	4	43.1986	4.175242	0.0105
2FI vs. linear	16.39158	6	2.731929	0.212032	0.9682
Quadratic vs. 2FI	169.3645	4	42.34113	9.4758	0.0006	Suggested
Cubic vs. quadratic	47.08083	8	5.885104	2.281641	0.1653	Aliased
Residual	15.47598	6	2.579329
Total	3041.398	29	104.8758