As we saw recently on this
> (or another stats list), there is much confusion between
> "one-tailed" in the sense of a directional test (which concerns
> the direction of differences or correlations) and "one-tailed" in
> the narrower sense of tail of distribution (e.g., chi^2). These
> uses are _not_ equivalent. Perhaps less confusing if we use
> "directional" or some other term besides "one-tailed" for the
> first sense.
>
Years ago the terms 'one sided' and 'two sided' were used rather than
'one tailed' and 'two tailed'. To me, this emphasises the statement of
the alternative hypothesis (that is, the directionality) rather than the
ends of the distribution used.
Alan
--
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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