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| <!---- [[Image:Mu_.png|thumb|Meet mu.]] ---->
| | #redirect [[AllegSkill#Mu & Sigma]] |
| [[Image:MuSigmaDifferenceGraph.png|thumb|'''Graphical meaning of μ.''' Those functions say how likely it is for a player to really have that rank, given current mu and sigma. Mu is the center of the bell shape, i.e. what the system thinks as your most likely rank.]]
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| '''Mu''' (μ) is the average skill of a player across all games played. The higher your Mu, the more likely it is that your contribution to your team will result in a win. The converse is also true. All players start with a Mu of 25, and all Mus fit within the range 0 - 50. A starting value of 25 means that AllegSkill is assuming new players to be perfectly average. Mu will increase or decrease depending on a number of factors including, but not limited to:
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| *Whether you win or lose games. Winning will result in an increase.
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| *How challenging the game was. Winning against a more skilled team will result in a larger increase to Mu. Losing to a more skilled team will result in a small decrease to Mu.
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| *The value of your [[Sigma]]. A higher value for sigma will result in larger changes to Mu.
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| {{AllegSkill}}
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