title: The use of statistics to examine the association between fluoride in drinking water and cancer death rates.
abstract: "The basis of statistical tests of significance of association between fluoride level in drinking water and cancer death rates is discussed.  Reference is made to two reported studies in each of which cancer death rates of a number of [U.S.] cities were used.  It is argued that between city variation should be taken into account when performing tests of significance.  In one of the two studies this was done informally; in the other between city variation was ignored."
authors.forename: J S
authors.initials: JS
authors.lastname: Maritz
authors.forename: R G
authors.initials: RG
authors.lastname: Jarrett
mesh_terms: D000569:Americas; D002423:Cause of Death; D003247:Conservation of Natural Resources; D003710:Demography; D019049:Developed Countries; D004194:Disease; D004777:Environment; D009026:Mortality; D009369:Neoplasms; D009656:North America; D011153:Population; D011157:Population Dynamics; D012106:Research; D012494:Sampling Studies; D013223:Statistics as Topic; D014481:United States; D014505:Urban Population; D014881:Water Supply
keywords: Americas; Cancer; Causes Of Death; Comparative Studies; Data Analysis; Demographic Factors; Developed Countries; Differential Mortality; Diseases; Environment; Mortality; Natural Resources; Neoplasms; North America; Northern America; Population; Population Dynamics; Research Methodology; Sampling Studies; Statistical Studies; Statistics; Studies; United States; Urban Population; Water Supply