It says that a(t) should be independently distributed as normal random variables with mean=0. So can't I find an initial residual that makes the mean of the residuals 0?
On the paper, they say that they aim to take first-order regular difference and the first seasonal difference in order to remove the growth trend and the seasonality characteristics. thanks. . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
