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单词 expected value
释义
ex·pect·ed value (ĭk-spĕktĭd)
n.
1. A quantity expressing a typical or average value of a random variable.
2. The sum (for discrete variables) or integral (for continuous variables) of the product of a random variable with its probability density function, over its range of values.
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更新时间:2024/11/11 13:41:30