Question: * 8. A fair coin is tossed a random number N of times, giving a total of X heads and Y tails. You showed in
* 8. A fair coin is tossed a random number N of times, giving a total of X heads and Y tails. You showed in Problem 3.6.14 that X and Y are independent if N has the Poisson distribution. Use generating functions to show that the converse is valid too: if X and Y are independent and the generating function GN (s) of N is assumed to exist for values of s in a neighbourhood of s = 1, then N has the Poisson distribution.
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