作者adofly (風)
看板Statistics
標題[問題] 想請教一題有關負二項分配的問題
時間Tue Dec 19 21:29:27 2006
If X is distributed from a negative binomial distribution with an
integer-valued parameter r and 0 < p < 1 , which is denoted by NBD(r,p)
for short. Assume that X1 and X2 have the same distribution as X
and X1 + X2 come from NBD(r,P*), where p* = p/(2-p). Evaluate the
covariance of X1 and X2.
這答案我想應該不是零吧@@"，不過我想不太出來說，有人可以幫我解說一下嗎
謝謝啦
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