[R] confidence interval given by prop.test()

Uwe Ligges ligges at statistik.uni-dortmund.de
Mon Sep 24 22:42:37 CEST 2001

On Mon, 24 Sep 2001 mai at ms.uky.edu wrote:

> I think the confidence
> interval are those values of the parameter that have a large
> P-value, so independent of the specific null hypothesis
> that we are testing.  i.e. we can construct a conf. int. from
> data without doing a test. The fact that we (later) also
> want a test should not change the calculation of the 
> confidence interval.

OK. You are so right! It's too late to work!

It happens because Yates' continuity correction is used, which
can be turned off:
 prop.test(..., correct=FALSE)
[BTW: The same in S-Plus]

Uwe Ligges

r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch

More information about the R-help mailing list