请问AR(1)的斜率系数是怎么算的啊 还有MA(1)的，是用回归模型的那个式子吗

问题如下：

The purpose of more than one order lagged moving average process is to:

选项：

A.

invert the moving average process to make the formula more useful.

B.

add exactly two additional lagged variables to the original specification, because 2-nd order moving average estimates most accurately.

C.

add another error term to an MA(1) process.

D.

add as many additional lagged variables as needed to more robustly estimate the data series.

解释：

D is correct.

考点：MA Process and AR rocess

解析：在移动平均过程中用很多自变量的意义是为了获得更好的因变量的估计，多滞后几个数据进行估计有时候会获得更可靠的结果。