title: Significance tests.
abstract: Simple methods of determining whether the difference between a sample mean and a given standard value is likely to be due only to sampling error, or to be real and/or of practical importance, are described. The use of the null hypothesis and of standard normal deviates is discussed, and examples are provided to illustrate the points made.
authors.forename: J S
authors.initials: JS
authors.lastname: Bulman
authors.forename: J F
authors.initials: JF
authors.lastname: Osborn
mesh_terms: D003793:Dental Restoration, Permanent / Q000706:statistics & numerical data; D003813:Dentistry; D006801:Humans; D008433:Mathematics; D012107:Research Design; D013223:Statistics as Topic