Table 5.

The parameters of the ARIMA model with BSI as the external variable.

	Coefficient	Standard error	T	P-value
AR1	0.688	0.169	4.074	<0.001
MA1	−0.892	0.119	−7.524	<0.001
SMA1	−0.572	0.144	−3.972	<0.001
B1	3.057	0.815	3.751	<0.001
B2	−0.536	0.211	−2.530	0.011
B4	8.712	3.202	2.721	0.007