# Difference between revisions of "Expected value"

From Lesswrongwiki

Steven0461 (talk | contribs) m |
Steven0461 (talk | contribs) m |
||

Line 1: | Line 1: | ||

− | |||

{{wikilink}} | {{wikilink}} | ||

+ | |||

+ | The "expected value" or "expectation" is the average of all the possible outcomes of an event, weighted by their probability. For example, when you roll a die, the expected value is (1+2+3+4+5+6)/6 = 3.5. | ||

== See also == | == See also == |

## Revision as of 09:25, 29 August 2009

The "expected value" or "expectation" is the average of all the possible outcomes of an event, weighted by their probability. For example, when you roll a die, the expected value is (1+2+3+4+5+6)/6 = 3.5.