If the ACF of some model cut off at lag 2, the model will be ____
A: AR(2)
B: MA(2)
C: ARMA(2,2)
D: cannot tell due to lack of information.
A: AR(2)
B: MA(2)
C: ARMA(2,2)
D: cannot tell due to lack of information.
举一反三
- 若零均值平稳序列,其样本ACF和样本PACF都呈现拖尾性,则对该可能建立( )模型。 A: MA(2) B: ARMA(1,1) C: AR(2) D: MA(1)
- Model 2 “India Model” includes ________________.
- MVC属于_____。 A: Model 1 (JSP+JavaBean) B: Model 2 (JSP+Servlet+JavaBean) C: Model 3 D: Model 4
- 若零均值平稳序列{xt},其样本ACF和PACF都呈现拖尾性,则对{xt}可能建立( )。 A: AR(1) B: MA(1) C: MA(2) D: ARMA(1,1)
- 四级阅读 Model Test 2 (15选10)