摘要
讨论指数母函数的性质,利用指数母函数得到几个结论的新证明;给出利用指数母函数计算随机变量数学期望的方法.利用这种方法,比直接利用数学期望和方差的定义计算更加简易.
The properties of exponential generating function were discussed. With exponential generating function new proof of some results was obtained , and the method of computing expected values was given. This method is simpler and easier than the one with direct calculation expected value and variance by definition.
出处
《重庆文理学院学报（社会科学版）》
2014年第2期33-35,共3页
Journal of Chongqing University of Arts and Sciences（Social Sciences Edition)
基金
喀什师范学院课程建设项目(KKAZ1204)
关键词
随机变量
数学期望
方差
指数母函数
random variable
expected value
variance
exponential generating function
