On Sat, 8 Sep 2001, Magenta wrote in part:
(responding to Rich Ulrich's remark:)
> > Michelle, I hope that you now know that you got tangled up in
> > hypothetical illustrations which you now regret.
>
> Sure do, I think that if you redid it so that the scale was now:
>
> don't agree strongly agree
> |_______________________________________|
>
> that would give you a ratio scale between no agreement and strong
> agreement.
Well, in SOME circumstances, perhaps it might; but I don't see a
persuasive rationale for "it WOULD give you a ratio scale" [emphasis,
obviously, added].
> You would then be able to use, e.g. ANOVA, on your test results, which
would be numeric in millimeters.
Or other units of length -- sixteenth-inches, micro-furlongs, etc.
But really, you don't need a ratio scale for ANOVA, you know.
At most you need an interval scale, and even then "approximately"
(that is, approximately interval) works very well much of the time.
------------------------------------------------------------------------
Donald F. Burrill [EMAIL PROTECTED]
184 Nashua Road, Bedford, NH 03110 603-471-7128
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