Pronunciation key ( ek′spek-tā′shən ) |
ex•pec•ta•tion
n.
[L. expectatio < pp. of expectare; see EXPECT].
- The state of looking forward toward something expected, eager anticipation.
- Anticipation of a thing that expected; due, proper or necessary.
- A thing that is looked forward to.
- plural. Expectations. Reason or reasons to look forward to something such as a prospect for the future, such as an advancement, prosperity or inheritance.
- Degree of probability for the occurrence of something. Expected value of a random variable, esp. the mean.
Expectation. German ERWARTUNG, a one-act opera created by Arnold Schoenberg, composed in 1909 and initially performed in 1924.
Expectation, Conditional. Expectation of the conditional distribution of two random variables, i.e., the expected value of one of the variables as a function of the values of the other variable. [Britannica Micropedia]
Expectation, Mathematical of a random variable, being in the discrete case the summation of the product of each mass point times its mass (or relative frequency), and being in the continuous case the integral of the product of the random variable with its probability density function. [Britannica Micropedia]
Expectation, Value. Quantum Mechanics. The weighted average of the various possible eigenvalues for a given state, each eigenvalue being weighted by the probability that it will be observed. [Britannica Micropedia]
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