比如下面这个例子:
summary(auto.arima(z))
Series: z
ARIMA(4,0,2) with zero mean
Coefficients:
ar1 ar2 ar3 ar4 ma1 ma2
-0.5505 0.2316 0.0880 -0.4325 -0.1944 -0.5977
s.e. 0.1657 0.1428 0.1402 0.1270 0.1766 0.1732
sigma^2 estimated as 417.6: log likelihood=-347.56
AIC=709.13 AICc=710.73 BIC=725.63
Training set error measures:
ME RMSE MAE MPE MAPE MASE
Training set 2.948732 20.43421 14.6533 85.00813 200.1053 0.6767153
有没有办法检验系数估计的显著性啊?