A QQ plot has also been called an ordinal-dominance curve. There's a
1975 paper by Donald Bamber on them in the Journal of Mathematical
Psychology.
A QQ plot is similar to a receiver operating characteristic (ROC)
curve (they're the same, except for a 180 degree rotation). This comes
about because a QQ plot is based on cumulating probability from below
a cutoff value, whereas an ROC curve cumulating probability from above
a cutoff value.
A web search on "ROC curve" or "ROC analysis" will give you plenty of
hits.
On Mon, 22 Nov 1999 05:05:54 -0800, Patrick
<[EMAIL PROTECTED]> wrote:
>Hi there,
>
>I was wondering if anyone knows of any URLs (or other web
>resources) with info RE: How to interpret QQ-plots,
>plotting one variables' quantiles vs. another variables'
>quantiles. I've found quite a bit of useful information on
>how to interpret QQ-plots (quantile-normal plots?) plotting
>one variables quantiles vs. quantiles of a theoretical
>distribution, but not for comparing 2 variables.
>
>Anyhow, if anyone has any info I would greatly appreciate
>it.
>
>Thanks,
>
>Patrick
>
>[EMAIL PROTECTED]
>[EMAIL PROTECTED]
>
