Re: Gaussian variance estimation

"David Delgado Gomez" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED]
> Good morning,
>
> I have data with a normal distribution.  Values higher than the mean are
> corrupted with noise. Is it possible to estimate the variance of the
> gaussian distribution just taking into account values smaller than the
> mean?
> Thanks
> David

If you already know the mean mu and think it is reliable,
my first idea would be to throw away all the data above
mu, and then for each value v < mu, I would "add to the
sample" a new value 2mu-v (which is symmetrical w.r.t.
the mean), and use this manipulated sample to estimate
the variance ;-)

Just a thought of course...

Dirk Vdm