[R] R-help Digest, Vol 109, Issue 9
therneau at mayo.edu
Fri Mar 9 14:34:44 CET 2012
On Fri, 2012-03-09 at 12:00 +0100, r-help-request at r-project.org wrote:
> > A note on standard errors: ?S(t) +- std is a terrible confidence
> > interval. ?You will be much more accurate if you use log
> scale. ?(Some
> > argue for logit or log-log, in truth they all work well.) ? If n is
> > enough, however, you should be ok.
> Very true, but if one really wants a confidence interval for
> S_1(t)-S_2(t) (not for S_1(t)/S_2(t)) then one is pretty much forced
> to use the raw probability scale.
I agree, and stand corrected.
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