title: Statistics notes: variables and parameters.
authors.affiliation: ICRF Medical Statistics Group, Centre for Statistics in Medicine, Institute of Health Sciences, Oxford OX3 7LF.
authors.forename: D G
authors.initials: DG
authors.lastname: Altman
authors.forename: J M
authors.initials: JM
authors.lastname: Bland
mesh_terms: D003627:Data Interpretation, Statistical; D013223:Statistics as Topic