I also agree, and have the same concern.
To test
Ho: d<=0
Ha: d>0
one gives the null the 'maximum benefit of the doubt' (expressed in terms of court
cases) and use the boundary value d=0 to assess the alternative. This happens to have
the mathematical advantage of providing a unique value of the parameter d
so that the test can actually be carried out.
Regards,
Alan
"William B. Ware" wrote:
> On 8 May 2000, Richard M. Barton wrote:
>
> > ***Technically incorrect? I'm not so sure. I just looked in stat books by 13
>authors, to see how null and alternative hypotheses were presented in a one-tailed
>testing situation. Most of my books are from the social sciences. Results:
> >
> > 1 texts presented hypotheses in the form of
> > Ho: d<=0
> > Ha: d>0
> >
> > 10 presented in the form of
> > Ho: d=0
> > Ha: d>0
> >
> > 2 presented both forms
>
> I happen to agree with Don's assertion that this "incomplete" form is
> technically incorrect. My concern is the implication of Richard's finding
> as an assessment of the quality of the texts that are being used...
>
> WBW
>
> __________________________________________________________________________
> William B. Ware, Professor and Chair Educational Psychology,
> CB# 3500 Measurement, and Evaluation
> University of North Carolina PHONE (919)-962-7848
> Chapel Hill, NC 27599-3500 FAX: (919)-962-1533
> http://www.unc.edu/~wbware/ EMAIL: [EMAIL PROTECTED]
> __________________________________________________________________________
>
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--
Alan McLean ([EMAIL PROTECTED])
Department of Econometrics and Business Statistics
Monash University, Caulfield Campus, Melbourne
Tel: +61 03 9903 2102 Fax: +61 03 9903 2007
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