# Expected value

From Lesswrongwiki

Revision as of 22:54, 28 August 2009 by Steven0461 (talk | contribs)

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