The Guy Medals are awarded by the Royal Statistical Society in three categories; Gold, Silver and Bronze. The Silver and Bronze medals are awarded annually. The Gold Medal was awarded every three years between 1987 and 2011, but is awarded biennially as of 2019. They are named after William Guy.
The Guy Medal in Gold is awarded to fellows or others who are judged to have merited a signal mark of distinction by reason of their innovative contributions to the theory or application of statistics.
The Guy Medal in Silver is awarded to any fellow or, in exceptional cases, to two or more fellows in respect of a paper/papers of special merit communicated to the Society at its ordinary meetings, or in respect of a paper/papers published in any of the journals of the Society. General contributions to statistics may also be taken into account.
The Guy Medal in Bronze is awarded to fellows, or to non-fellows who are members of a section or a local group, in respect of a paper or papers read to a section or local group or at any conference run by the Society, its sections or local groups, or published in any of the Society's journals. Preference will be given to people under the age of 35. Exceptionally two or more authors of a paper/papers may be considered for the award provided they are members of sections or local groups.
^"Report of the Council for the Session 1995-96". Journal of the Royal Statistical Society. Series A (Statistics in Society). 159 (3): 565–610. 1996. doi:10.1111/j.1467-985X.1996.tb00774.x. JSTOR2983332.
^"Archived copy". faculty.washington.edu. Archived from the original on 23 June 2004. Retrieved 17 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)