Expected value

In probability theory the expected value (or mathematical expectation, or mean) of a discrete random variable is the sum of the probability of each possible outcome of the experiment multiplied by the outcome value (or payoff). Thus, it represents the average amount one "expects" as the outcome of the random trial when identical odds are repeated many times. Note that the value itself may not be expected in the general sense - the "expected value" itself may be unlikely or even impossible.
See more at Wikipedia.org...

Noun
1. the sum of the values of a random variable divided by the number of values
(synonym) arithmetic mean, first moment, expectation
(hypernym) mean, mean value
(classification) statistics

The weighted average of a probability distribution. Also known as the mean value.

See expected value. Often used in poker to mean "profitability in the long run".
  

Expected value
(Econ) Giá trị kỳ vọng; giá trị dự tính.+ Còn được gọi TRUNG BÌNH, kỳ vọng toán học.Giá trị kỳ vọng của một BIẾN SỐ NGẪU NHIÊN là giá trị trung bình của phân phối của biến ấy.
(C) 2007 www.TừĐiểnTiếngViệt.net