expected value

the value of a random variable or one of its functions as derived by mathematical calculation rather than observation. It is symbolized by E(x), with x varying according to the specific item of interest that is being calculated. Usually, the expected value is a mean or weighted average.

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Psychology term of the day

July 27th 2024

vital functions

functions of the body (e.g., respiration, blood circulation of the blood) that are necessary to sustain life. Many vital functions are controlled by the brainstem.