# mathematical expectation

### noun

Mathematics. the product of the probability of the occurrence of an event and the value associated with the occurrence of a given event.

Statistics. the summation or integration, over all values of a variate, of the product of the variate and its probability or its probability density.

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Where Did The Word”Pi” Come From?What is Pi Day? Pi Day is the March 14th holiday commemorating the mathematical constant π (pi), written numerically as 3.141592+, and pronounced “pie.” And yes: lots of people mark the occasion by eating pie because of course they do. Where is the word pi from? Pi is the Latin name of the sixteenth Greek letter, π. (Mathematic notation borrows from a multitude of alphabets and typefaces) The first recorded use …

## Nearby words

- math,
- math.,
- matha,
- mathematic,
- mathematical,
- mathematical induction,
- mathematical logic,
- mathematical probability,
- mathematician,
- mathematics

## Origin of mathematical expectation

First recorded in 1830–40

Also called expectation, expected value.

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

## mathematical expectation

### noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012