Combined Prediction of Clean Energy Consumption in China Based on the Nonlinear Programming Model

Table 4

Parameter estimation of ARIMA (2,1,1).

Variable	Coefficient	Std. error	t-Statistic	Prob
C	8250.7722	1814.6789	4.5466	0.0008
AR(2)	0.8022	0.0882	9.0896	0.0000
MA(1)	−0.9671	0.0697	−13.8730	0.0000