James Ankeny wrote:
>
[snip]
>Please tell me if this is way off, but when they say
> that a binomial rv may be normal for large n, it seems like this would only
> be true if they were talking about a sampling distribution where repeated
> samples are selected and the number of successes calculated.
A single observation may be normally distributed.
Similarly, a single binomial random variable, (with large
enough n, and success probability not too small) has a
distribution that is approximately normal.
Of course "approximately" must be predicated on the
fact that the distribution is still going to be discrete.
It may be easier to picture if you think in terms of the
distribution of the sample proportion
Glen
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