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单词
expected value
释义
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
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
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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