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RE: st: RE: Bargraphs, order, SD
-ciplot- from SSC may help. But the existence of
that program does not affect that the fact that
it display less information than a -dotplot-.
Go on, surprise your supervisor by using a better
graph than (s)he suggested.
Nick
[email protected]
Knag Anne-Christine
> I was told by my supervisor to use SE, but I�ve seen similar
> plots with CI.
> As I do not manage to make it right in STATA, I think I�ll
> have to create
> the bar graphs in Excel. I thought this would me much easier
> than it turn
> out to be. I only want to make one graph with all nine types
> containing the
> variable with SE /CI.
> On 6/11/07 1:35 PM, "Ronan Conroy" <[email protected]> wrote:
>
> > On 11 Meith 2007, at 12:00, Nick Cox wrote:
> >
> >> Biologists in particular seems overly fond of just
> >> showing means (+/- sd, se, or constant * se) in what
> >> Stata user Paul Seed has called detonator plots.
> >>
> >> A dotplot with means and sds added (see -dotplot-)
> >> shows far more information.
> >
> > It's a lazy habit, and one which has been opposed by the guidelines
> > of the International Committee of Medical Journal Editors
> since their
> > initial publication in 1979. The guidelines state:
> >
> > Describe statistical methods with enough detail to enable a
> > knowledgeable reader with access to the original data to verify the
> > reported results. When possible, quantify findings and present them
> > with appropriate indicators of measurement error or
> uncertainty (such
> > as confidence intervals).
> >
> > Note that the appropriate indicator of measurement error is the
> > confidence interval. There is also disconcerting research
> which shows
> > the extent to which error bars are misunderstood by readers.
> >
> > http://psyphz.psych.wisc.edu/~shackman/belia_PsychMeth2005.pdf
> >
> > Does anyone know of a serious reason for putting error bars in
> > graphs? The one I always get is "but the journal will expect it" or
> > "but everyone does it", neither of which is a defense.
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