weighted mean; weighted standard error of the mean (sem)

[C Barrington-Leigh]

> The best place to ask about numpy related stuff is the numpy mailing list at:
>
> http://mail.scipy.org/mailman/listinfo/numpy-discussion
>
> This is also the best place to present a patch if you have code to
> contribute. In my experience the numpy devs are always happy to have
> new contributors, but be sure to discuss the problem first, as the
> folk over there might be able to provide a solution which doesn't
> require a new patch.


Thanks, Tim,

Ooops -- the sem() I mentioned is  sciypy.stats.sem, not in numpy...
Does your advice hold?
Thanks,
c