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首页 - 英汉词典 - E字开头的单词或词组 - expected value

英语解释

expected value

汉语翻译

【计】期望值, 期待值
【化】期望值; 期待值; 统计平均值
【经】预期值

expected value英语解释

名词 expected value:

the sum of the values of a random variable divided by the number of values
同义词：arithmetic mean, first moment, expectation

expected value例句

The expected value of a positive integral power of a random variable. The first moment is the mean of the distribution.
矩，动差任意变量的正整数功效的期望值。第一个矩是分配的平均数

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