locust0923大大說 用三項分配
但是....沒聽過耶><
※ 引述《NiceKitty (想要有個依靠><)》之銘言：
: 不好意思再請教各位大大一題><
: Consider n independent trials,each of which results in any of the
: outcomes i, i=1,2,3 with respective probabilities P1,p2,p3
: 3
: ΣPi=1.Let Ni denote the number of trials that result in outcome i,
: i=1
: and show that Cov(N1,N2).
: Also explain why it is intuitive that this covariance is negative.
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 58.114.107.8
※ 編輯: NiceKitty 來自: 58.114.107.8 (01/14 21:43)