概率母函数
定义
多变量情形
如果 X = (X1,...,Xd ) 是在d-非负整数格{0,1, ...}d上取值的离散随机变量, 那么X的概率母函数定义为
其中 p 是X的概率质量函数。
参考文献
- Johnson, N.L.; Kotz, S.; Kemp, A.W. (1993) Univariate Discrete distributions (2nd edition). Wiley. ISBN 0-471-54897-9 (Section 1.B9)
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