An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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mathematical expectation
  امید ِ مزداهیک، بیوسش ِ ~، ~ ِ ریاضی  
omid-e mazdâhik, bayuseš-e ~, ~ riyâzi
Fr.: espérance mathématique  

In probability and statistics, of a random variable, the summation or integration, over all values of the random variable, of the product of the value and its probability of occurrence. Also called → expectation, → expected value.

See also: → mathematical; → expectation.