Table 1.

Coefficient, standard error, t-Statistic and p-values of the SARIMA models of the parameters.

Variable	Coefficient	Standard error	t-Statistic	p-value
Parameters of the SARIMA model (1,0,0)(1,1,1)12
C	−0.2553	0.1021	−2.5013	0.0138
Non-seasonal AR(1)	0.6426	0.0725	8.8665	<0.0001
Seasonal AR(1)	−0.4561	0.0467	−9.7579	<0.0001
Seasonal MA(1)	0.9269	0.0150	61.6900	<0.0001
Parameters of the SARIMA model (1,0,0)(0,1,1)12
C	−0.2064	0.0778	−2.6565	0.0089
Non-seasonal AR(1)	0.6767	0.0640	10.5822	<0.0001
Seasonal MA(1)	−0.5011	0.0744	−6.7373	<0.0001
Parameters of the SARIMA model (2,0,0)(1,1,1)12
C	−0.2385	0.1007	−2.3692	0.0195
Non-seasonal AR(1)	0.7527	0.0915	8.2265	<0.0001
Non-seasonal AR(2)	−0.1257	0.0920	−1.3660	0.1747
Seasonal AR(1)	−0.4031	0.0480	−8.3926	<0.0001
Seasonal MA(1)	0.9219	0.0164	56.2240	<0.0001
Parameters of the SARIMA model (2,0,0)(0,1,1)12
C	−0.2208	0.0863	−2.5577	0.0117
Non-seasonal AR(1)	0.5378	0.0890	6.0495	<0.0001
Non-seasonal AR(2)	0.1839	0.0860	2.1372	0.0345
Seasonal MA(1)	−0.5261	0.0740	−7.1113	<0.0001

SARIMA, seasonal auto-regressive integrated moving average; C, constant terms; AR, auto-regressive; MA, moving average.