Application of Gene Expression Programming to Evaluate Strength Characteristics of Hydrated-Lime-Activated Rice Husk Ash-Treated Expansive Soil

Table 3

Statistical parameters of the input and output parameters.

	Input soil hydraulic-prone properties						Output soil strength properties
					AC	δmax	CBR	UCS28	RValue
Min.	27.00	12.80	14.00	16.00	0.60	1.25	8.00	125.00	11.70
Max.	66.00	21.00	45.00	19.00	2.00	1.99	44.60	232.00	27.00
Sum	5808	2078	3730	2181	163	204	2904	20917	2481
Mean	48.00	17.17	30.82	18.02	1.35	1.69	24.00	172.87	20.50
Median	49.00	17.70	31.00	18.20	1.40	1.69	22.80	172.00	20.90
SD	11.49	2.40	9.11	0.77	0.40	0.24	11.69	31.53	4.46
Kurtosis	−1.25	−1.24	−1.25	0.24	−1.18	−1.42	−1.17	−1.04	−0.79
Skewness	−0.13	−0.06	−0.14	−0.94	−0.21	−0.17	0.30	0.26	−0.44