... 变异数 variance 随机变数之变异数 variance of random variable 脉波扩散变异 variance， pulse boradening ...
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Variance of discrete random variable 离散型随机变量的方差
variance of a random variable 随机变量的方差
variance of fuzzy random variable 模糊随机变量的方差
variance of fussy random variable 模糊随机变量的方差
variance of continuous random variable 连续型随机变量方差
And finally, this tool-the generating function-can be used to get some expectation and variance of random variable of continual-type non-negative distribution.
最后利用母函数这一工具求得一些连续型非负分布随机变量的数学期望及方差。
We furthermore calculate the expectation and variance of random variable, and discuss the approximate value of no-arbitrage price when jump obeying poisson distribution.
本文进一步计算出股票价格模型的期望与方差，讨论了跳跃服从对数泊松分布时模型的无套利价格的下界。
The variance of a random variable measures how far from the expected value its values typically are.
随机变量的方差衡量随机变量值与期望值偏离的程度。
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