Mathematical Sciences

News and events

13 December 2018

Research Seminar: The Christmas Tree Plot: A graphical tool for assessing the suitability of a count regression model

Presented By Paul Wilson (University of Wolverhampton)
  • 3.00pm-4.00pm
  • N.1.12 Haselgrave

About this event


Whilst many numeric methods, such as AIC and deviance, exist for assessing or comparing model fit, diagrammatic methods are few.  We present here a diagnostic plot, to which we refer as `Christmas tree plot', due its characteristic shape, that may be used to visually assess the suitability of a given count data model.  The origin of this method stems from a desire to develop techniques for assessing the suitability of count regression models that would be understandable to statistical practitioners.  We will also outline this history.