In Module 3, there is a demonstration titled “Demo: Estimation, Residual Analysis and Goodness of Fit”. At the very end of the video, there are two estimates produced by SAS:
Model for Variable kW_Gen
0.520193
Autoregressive Factors
Factor 1 = 1-0.708913B**(1)
I can find earlier in the output the estimate of mu. In that same area, the estimate for the AR1,1 term is 0.708913.
Earlier in the course, AR(1) is:
Y_t = mu(1-phi_1) + phi_1*Y_(t-1) + e_t
My question is what does Factor 1 represent, in general, and what is “B**(1)” in particular?
Thank you.