Encyclopedia
Expected value
Mathematical expectation is the average value of a random variable. Mathematical expectation is a deterministic quantity. The arithmetic mean of realizations of a random variable represents an estimate of mathematical expectation. The arithmetic mean is a random variable, but as the number of realizations increases, it approaches the mathematical expectation
Source: "ANALYSIS OF AGE-SPECIFIC MORTALITY RISKS OF THE POPULATION. METHODOLOGICAL RECOMMENDATIONS"
(approved by the Ministry of Health of Russia on 22.01.2001 No. 11-3/25-09)