title: Reading research critically: results--group data.
abstract: The article explains what to look for when an investigator compares data from two distinct groups. The most common statistical methods of doing these evaluations are the chi-square test and the t test. Both tests are explained.
authors.forename: M
authors.initials: M
authors.lastname: Giuffre
mesh_terms: D016009:Chi-Square Distribution; D003627:Data Interpretation, Statistical; D006801:Humans; D015399:Nursing Research