right, if you just want to come out of there and we'll just have a look at the plot of the residuals, if you plot the residuals  the test for serial correlation there  well the test for serial correlation, right, and try and determine whether there's a auto regressive structure to those parameters and i think steve  was talking to you about er auto regressions, so what the computer is doing essentially, it is getting the residuals from the model  raised and it's regressing them  right on the residuals in the previous period, right, and it's testing whether this parameter row, right, is significantly different from zero  right, now if this is, if row is significantly different from zero, let's say it's nought point six, that implies the residuals in t are not independent of the residuals in t minus one.