5. Consider two independent random variables X1 and X2 with Poisson distribution: 61de37911046b.jpgWhich of the following statements is wrong?
(A) The mean of Xi is λi
(B) The variance of Xi is 1/ λi 
(C) The moment generating function of Xi is61de386c4cb8b.jpg
(D) X1 + X2 is Poisson distributed
(E) None of these

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統計： A(0), B(2), C(0), D(0), E(0) #2852331