@prefix n9j: <http://data.loterre.fr/ark:/67375/N9J> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

n9j:-methods
  a isothes:ConceptGroup ;
  skos:prefLabel "methods"@en ;
  skos:member n9j:-F97MGTQL-J .

n9j: a skos:ConceptScheme .
n9j:-W4PPTLZN-X
  skos:prefLabel "correlation"@en ;
  a skos:Concept ;
  skos:narrower n9j:-F97MGTQL-J .

n9j:-F97MGTQL-J
  owl:sameAs <https://concepts.sagepub.com/social-science/concept/phi_coefficient> ;
  skos:definition "a variant of Pearson's correlation applied to two variables each of which takes one of two values which may be coded 1 or 2 (or any other pair of values for that matter). As such, its most common applications are in correlating two items on a questionnaire where the answers are coded yes or no (or as some other binary alternatives), and in circumstances in which a 2 x 2 chi-square would alternatively be employed. [Source: The SAGE Dictionary of Statistics; phi coefficient]"@en ;
  a skos:Concept ;
  skos:inScheme n9j: ;
  skos:broader n9j:-W4PPTLZN-X, n9j:-PT0CSW3B-L ;
  skos:prefLabel "phi coefficient"@en .

n9j:-PT0CSW3B-L
  skos:prefLabel "chi-square test"@en ;
  a skos:Concept ;
  skos:narrower n9j:-F97MGTQL-J .