Hello, On 8/16/09, Robert A LaBudde <r...@lcfltd.com> wrote: > The "basic" interval (which you are using by default) is just the usually > normal distribution interval with the standard error estimated from the > resampling distribution. It has all the benefits and problems of assuming a > normal distribution. > You probably refer to the bootstrap "normal" interval, which assumes the normal distribution. The "basic" and "percentile" intervals seem to have less restrictive assumptions. (from Rnews_2002-3)
> If you wish to maintain the domain limits on the correlation, use the > "percentile" method, which would use the 2.5% and 97.5% quantiles of the > resampling distribution. > > Because you clearly have a non-central correlation (-0.8), you would get > more accurate results with the "BCa" method, which does bias and skew > correction of the resampling distribution. > Yes. I first considered "percentile", but after reading J. Fox's appendix on bootstrapping I settled for "BCa". Best Liviu ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
