Derivation of the Poisson distribution
Derivation of the Poisson distribution
- From Bob Deserio’s Lab handout
A better way of describing ( is as a probability per unit time that an event will occur. That is
dP = (dt (3)
where dP is the differential probability that an event will occur in the infinitesimal time interval dt. Of course, some care must be taken when translating a rate to a probability per unit time. For example, if ( = 10/s, it is obviously not true that the probability is 10 that an event will occur in any particular second. However, if that same rate is expressed ( = 0.01/ms it is roughly true that the probability is 0.01 that an event will happen in any particular millisecond. Eq. 3 only becomes exact in the limit of infinitesimal dt. It is approximately correct for any finite (t.
(P=((t (4)
to the extent that (P ................
................
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