Compound Grey-Logistic Model and Its Application

Table 5

Statistics of model parameter estimation for case 2.

Model	Variable	Coefficients	Std. error	t stat	-value
Grey	b	43620.848	627.808	69.481	<0.001
	a	−0.098	0.002	−53.366	<0.001
Logistic	γ1	0.171	0.029	5.877	0.001
	γ2	<0.001	<0.001	−2.712	0.030
Grey-logistic	γ1	0.103	<0.001	2.916  10^13	<0.001
	γ2	<0.001	<0.001	5.430  10^7	0.183