expected value

英 [ɪkˈspektɪd ˈvæljuː]

美 [ɪkˈspektɪd ˈvæljuː]

期望（预期）值

计算机化学

英英释义

noun

• the sum of the values of a random variable divided by the number of values
  Synonym:arithmetic meanfirst momentexpectation

双语例句

• ( statistics) approximating the statistical norm or average or expected value.
  （统计学）接近统计的标准、平均数或预期值的。
• So how do you calculate the expected value for your investment in a tool?
  那么如何计算投资某种工具的期望值？
• You need some way of establishing the expected value for the decrypted message, for one thing.
  首先，您需要使用某种方法为解密消息确立预期值。
• The measure of the difference between the mean value and some maximum expected value for a particular data reading.
  一个特定数据的读取中，对平均值与某种最大期望值之间的差的度量。
• Depending on what the expected value is, that could be trillionths or it could be millions.
  根据期望值不同，这个值可以是万亿分之一，也可以是数百万。
• Instead, treatments designed to modify the expected value of the drug or food type may prove more effective.
  相反，成瘾性的治疗旨在改变药物或食物种类预期价值的，也可能证明有更多有效性。
• The expected value itself very rarely can help us.
  期望值本身很难帮助我们。
• 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。
• What is the expected value of these risks?
  这些风险的预期值是多少？
• I come from a math background, I believe in expected value.
  我自己是学数学的，所以很相信期望值。