二、方差的计算(Calculation of variance)1. )(XD =2 2( ) [ ( )]E X E XProof: 由方差的定义及数学期望的性质42( )D X 2{[ ( )] }E X E X })]([)(2{ 22XEXXEXE 2 2( ) 2 ...
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Demonstrate understanding of the concept and properties of a discrete random variable, including calculation and interpretation of the mean and variance.
示范不连续任意的变数观念和财产的理解，包括计算和解释那低劣的和不一致。
This paper gives a new concept of variance of fuzzy random variables and discusses it's property and calculation.
本文给出了模糊随机变量的方差这一概念，并讨论了它的一些性质及计算方法。
This paper introduces the approximate calculation of real number's or of vector parameter positive function's posterior mean, variance and forecasting density in mathematical statistics.
文章介绍了数理统计中实数或向量参数的正函数的后验平均、方差和预测密度的近似计算。
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