Study on the Modification Formula of Earth Material Compound with Cement and Gravel by Single Lattice Theory

Table 14

Estimation of the partial regression coefficient of y₃ regression equation for the standard deviation of mixed cement and gravel modified with raw soil.

Regression term	Partial regression estimation	t-test		Regression error of partial regression estimation
x1	1.51	4.36	0.0003	0.347
x2	1.04	2.98	0.002	0.346
x3	0.6	1.72	0.0129	0.346

Combining regression equation y₃, solving the equation  = 2.20,  = 0.447, range  = 1.755,  = 1.04, gradient  = 0.1, using Mathcad software, the results of equation y₃ are shown in Table 15.