# AQB Sports Ratings

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### History

The AQB sports ratings rate sports teams in comparison to each other using a mathematical system. AQB rates sports like Rugby, Soccer, NFL and Cricket and was formulated in the University of Waikato in New Zealand by Michael Cameron and is an abbreviation of the term Active, Quality Based Rating. Cricket teams have been rated by AQB since 1998.

### Methodology

The rating system in use takes into account all prior game results for every team and the quality of their opposition. Some of the factors involved in the calculation of the ratings are the old rating of the teams, the result of the current match, home advantage of the teams and the difference in team ratings before the match. The method then employs a formula which calculates the rating.

### The Formula

The formula used is Rn = Ro + R (B + H + DK)

Where;

*Rn’ = New ratingRo= Old ratingR= The result of the game. The team is given +1 in case it wins, -1 incase it looses, +0.25 if the match draws and the team started with a lower rating than the other team and -0.25 if the match draws and the team started with a higher rating than the other team.B **= The base ratings change for all result, The value of B is 20.H = The home advantage. The team is given +4 if it wins on a tour against the hosts, -4 if it is the host team and looses the match, 0 if the match is played on a neutral ground.D= The difference between the ratings of the two teamsK’* = The constant applied to weigh the ratings. The value of K is 0.05.

The cricket ratings for test and One day International cricket is calculated separately after each match played by all teams.

Currently the Australia cricket team tops the AQB cricket ratings in One day and Test cricket with 1322.24 in One day International cricket and 1274.73 in Test cricket.

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