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Re: Sampling From Finite Population with Replacement
Posted:
Sep 29, 2010 3:03 PM
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>
> >> The population mean is an unbiased estimate of the generator mean.
> >> The sample mean is an unbiased estimate of the population mean,
> >> and therefore of the generator mean.
>
> > I think you have a point here. But as you can see that there is a
> > problem with consistency.
>
> > Let's say that generator mean is Mu, and population mean is Mu + Eps.
> > And I take as you suggest Eps is a random error not a systematic error
> > (not a bias).
>
> > Now as you take more and more sample means, you will see that they
> > will start to gather around Mu+Eps not Mu. Now do we have a random
> > error or a systematic error?
>
> It all depends on whether we're talking about the conditional
> distribution of the sample mean, given the population mean; or the
> unconditional (or marginal) distribution of the sample mean. As an
> estimate of the generator mean, the ssmple mean is conditionally
> biased but marginally unbiased.
>
I don't think I am following you. How is all that related to
conditioning?
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