bbtomato

Dreary Wrote:
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> So, as in other tests, the null (Ho) says no
> positive serial correlation. If DW is below the
> lower end (d_low), then we reject the null and say
> there is positive serial correlation.

But if DW is above d_low and below d_up, we are in the neutral region, and we cannot conclude anything. Finally, if DW > d_up, we cannot reject the null (that there is no positive serial corr) and conclude that there is no positive serial corr.