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Re: st: query about the F test

From   "Clive Nicholas" <[email protected]>
To   [email protected]
Subject   Re: st: query about the F test
Date   Thu, 20 Jan 2005 15:20:37 -0000 (GMT)

Tumur Gunchinmaa wrote:

> Dear Members, My question is, I ran 2 OLS
> regression(below) both having the same number of
> observations(19) however one does not have the F test,
> instead is a dot.
> Regressions were
> reg y x1 x2 if z==1
> reg y x1 x2 if z==2
> What does the dot imply?

Clicking on the hypertext where the F test output would be (or consulting
-whelp j_robustsingular-, which amounts to the same thing) should tell

CLIVE NICHOLAS        |t: 0(044)7903 397793
Politics              |e: [email protected]
Newcastle University  |

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