Educational Research and Reviews

  • Abbreviation: Educ. Res. Rev.
  • Language: English
  • ISSN: 1990-3839
  • DOI: 10.5897/ERR
  • Start Year: 2006
  • Published Articles: 2006

Full Length Research Paper

Interaction and survival analysis of graduation data

Justin R. Chimka1* and Lauren Holloway Lowe2
Justin Chimka, 4207 Bell Engineering Center, Fayetteville, AR 72701, USA, (479) 575-7392, USA.
Email: [email protected]

  •  Accepted: 16 November 2007
  •  Published: 31 January 2008



This is the second in a series of articles describing ongoing research that involves studying engineering college student graduation using Cox proportional hazards models. The first article, called "Proportional hazards models of graduation," was based on main effects models of graduation controlling for descriptors such as in-state residence, hometown population, and student major. This second article attends to first-order interaction terms between pairs of previously considered main effects. Survival analysis of graduation data here suggests significance of standardized math scores, and English and Science ACT scores, under certain circumstances that might not have been discovered without the examination of interaction.


Key words: Graduation, proportional hazards, retention, survival analysis.