prop.test in R
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
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--
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