General Practice Statistics notes Variables and parameters BMJ 1999; 318 doi: https://doi.org/10.1136/bmj.318.7199.1667 (Published 19 June 1999) Cite this as: BMJ 1999;318:1667 Article Related content Metrics Responses Peer review Related articles Practice Parametric v non-parametric methods for data analysis Published: 02 April 2009; BMJ 338 doi:10.1136/bmj.a3167 See more Population attributable fraction BMJ February 22, 2018, 360 k757; DOI: https://doi.org/10.1136/bmj.k757 Statistics Notes: Percentage differences, symmetry, and natural logarithms BMJ August 16, 2017, 358 j3683; DOI: https://doi.org/10.1136/bmj.j3683 Statistics Notes: What is a percentage difference? BMJ August 16, 2017, 358 j3663; DOI: https://doi.org/10.1136/bmj.j3663 Inverse probability weighting BMJ January 15, 2016, 352 i189; DOI: https://doi.org/10.1136/bmj.i189 Statistics Notes: Bootstrap resampling methods BMJ June 02, 2015, 350 h2622; DOI: https://doi.org/10.1136/bmj.h2622 Cited by... Parametric v non-parametric methods for data analysisFulltext Article 6. An introduction to hypothesis testing. Parametric comparison of two groups--1Fulltext An introduction to everyday statistics--1Fulltext PDF