> > 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.