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Created by MrHen at 3y

(Since a die doesn't even have a face that says 3.5, this illustrates that very often, the "expected value" isn't a value you actually expect.)

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

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

The ~~Expected value~~"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.

The Expected value 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.

The Expected value is the 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.

Anyone objects to deleting this page? There seems to be no significance to it, it's even not linked from anywhere. --

Vladimir Nesov23:03, 8 July 2009 (UTC)## Video to demonstrate how to NOT think about expected value

http://youtu.be/kuXIpxoMYtc?t=20sGeorge Gervin (NBA Legend) says that the 3-point shot is the worst shot in basketball. His argument is basically that 3-point percentages are almost always lower than 2-point percentages. He seems to not give any weight to the fact that 3-point shots provide you with one extra point...

## Perhaps the example should include probabilities

The example with the 6-sided die doesn't explicitly show how probabilities are part of the calculation. Perhaps the example should do this.