IMA Journal of Management Mathematics Advance Access originally published online on September 16, 2008
IMA Journal of Management Mathematics 2009 20(2):97-108; doi:10.1093/imaman/dpn024
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This article appears in the following IMA Journal of Management Mathematics issue: Special Issue Mathematics in Sport [View the issue table of contents]
Uses and limitations of mathematics in sport

Mathematics Department, Mantell Building, University of Sussex, Falmer, Brighton BN1 9RF, UK
Email: j.haigh{at}susx.ac.uk
Received on 2 July 2007. Revision received 11 August 2008. A number of topics are reviewed under the theme of the interaction between mathematics and sport, mainly based on probabilistic or statistical considerations. Some differences and similarities that arise from different scoring systems, exemplified by motor racing and table tennis, are described. Ways of resolving ties in league tables, or drawn matches in individual contests, are explored, with examples from chess and soccer: a suggestion is made for modifying the usual penalty shoot-out in soccer so as to minimize its expected length. Two different ways of assessing the importance of single incidents within a larger contest are offered: both suggest that such incidents are equally important to both contestants. Sample calculations indicate that the importance of incidents may be fairly constant across a wide range of values for the parameters that govern the outcome of a contest. Two statistical phenomena—Simpson's paradox and regression to the mean—are illustrated by basketball and golf. Applications of dynamic programming, to American football and soccer, are outlined. Different ways of computing batting averages in cricket, perhaps more meaningful than those generally used, are noted.
Keywords: sport; rankings; ties; importance; dynamic programming