[R-sig-teaching] prop.test in R

[Albyn Jones]

I don't know, the help file is uninformative.  I'd guess the answer is
"the author wrote it that way".  Other R functions like t.test include
similar unfortunate (to me) default choices, in that case
var.equal=FALSE (ie the Welch test) is the default.

albyn

On Mon, Oct 25, 2010 at 04:15:20PM -0500, Laura Chihara wrote:
> Yes, thank you for this reference. But according to
> this article, the score is better than continuity
> correction, so why is continuity correction the default
> with prop.test?
> 
> -Laura
> 
> On 10/25/2010 4:02 PM, Ralph O'Brien, PhD wrote:
> >I suggest:
> >
> >A. Agresti and B. A. Coull. Approximate is better than ”exact” for
> >interval estimation of binomial proportions. The American Statistician,
> >52(2):119–126, 1998.
> >
> >
> >
> >
> >
> >
> >
> >On Mon, Oct 25, 2010 at 4:38 PM, Laura Chihara <lchihara at carleton.edu
> ><mailto:lchihara at carleton.edu>> wrote:
> >
> >    Hi,
> >
> >    I have a question about prop.test in R:
> >
> >    I teach students the score confidence
> >    interval for proportions (also called
> >    Wilson or Wilson score interval).
> >
> >    prop.test(,..., correct=FALSE) gives this
> >    interval.
> >
> >    The default uses a continuity correction.
> >    When should we use one over the other?
> >    Is it worth going over this in class? Why
> >    is correct=TRUE the default?
> >
> >    Thanks for any pedagogical guidance here!
> >
> >    -- Laura
> >
> >    *******************************************
> >    Laura Chihara
> >    Professor of Mathematics   507-222-4065 (office)
> >    Dept of Mathematics        507-222-4312 (fax)
> >    Carleton College
> >    1 North College Street
> >    Northfield MN 55057
> >
> >    _______________________________________________
> >    R-sig-teaching at r-project.org <mailto:R-sig-teaching at r-project.org>
> >    mailing list
> >    https://stat.ethz.ch/mailman/listinfo/r-sig-teaching
> >
> >
> >
> >
> >--
> >Ralph O'Brien, PhD
> >Professor, Dept of Epidemiology and Biostatistics
> >Case Western Reserve University
> >Office: 216.368.1927
> >Cell: 216.312.3203
> 
> -- 
> *******************************************
> Laura Chihara
> Professor of Mathematics   507-222-4065 (office)
> Dept of Mathematics        507-222-4312 (fax)
> Carleton College
> 1 North College Street
> Northfield MN 55057
> 
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> R-sig-teaching at r-project.org mailing list
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> 

-- 
Albyn Jones
Reed College
jones at reed.edu