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发帖数: 8 | 1 Pn(n1)=N!pow(p, n1)*pow(q,N-n1)/(n1!*(N-n1)!), where p+q = 1
What's the physical meaning of these two assumptions respectively?
1. in the limit of large N (infinity) and large pN (i.e., p not very small)
which gives Gaussian distribution;
and
2. in the limist of large N (infinity) and small p (pN << N)
which gives Poisson distribution.
thanks. |
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