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.
B
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)
内容
- 0
(x,y)A(-2,-2)B(-2,2)C(0,1)D(2,2)E(2,-2)(2x,2y)A、(,)B、(,)C、(,)D、(,)E、(,)
- 1
二元函数f(x,y)=4x-4y-x^2-y^2的驻点是 A: (2,2) B: (-2,2) C: (2,-2) D: (-2,-2)
- 2
产生钠的两条黄色D线的跃迁是() A: 2P1/2→2S1/2,2P3/2→2S1/2 B: 2S1/2→2P1/2,2S1/2→2P3/2 C: 2D3/2→2P1/2,2D3/2→2P3/2
- 3
一、单项选择(Single choice)(2 points per question,14 points total)The modern medical model refers to ( ) A: Psychic medical model B: Natural Philosophy Medical Model C: Biomedical model D: Biopsychosocial medicine model
- 4
直线3x+4y-2=0与直线2x+y+2=0 的交点坐标为() A: (-2,2) B: (-2,-2) C: (2,-2) D: (2,2)