| 指数母函数在数学期望计算中的应用 |
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| 引用本文： | 王丰效.指数母函数在数学期望计算中的应用[J].重庆文理学院学报,2014,33(2):33-35. |
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| 作者姓名： | 王丰效 |
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| 作者单位： | 喀什师范学院数学系,新疆喀什844000 |
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| 基金项目： | 喀什师范学院课程建设项目（KKAZ1204）. |
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| 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．
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| 关 键 词： | 随机变量 数学期望 方差 指数母函数 |
Application of exponential generating function in expected values |
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| WANG Fengxiao.Application of exponential generating function in expected values[J].Journal of Chongqing University of Arts and Sciences,2014,33(2):33-35. |
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| Authors: | WANG Fengxiao |
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| Institution: | WANG Fengxiao ( Department of Mathematics, Kashi Normal College, Kashi Xinjiang 844000, China) |
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| Abstract: | 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. |
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| Keywords: | random variable expected value variance exponential generating function |
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