{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "Used to describe the sum of squares of random variables which occurs when a variance is estimated (rather than presumed) from the sample.  The only parameter of the c2-distribution is n, so called the number of degrees of freedom (which is the number of independent parts in the sum).  The c2-distribution is a special type of g-distribution with parameter a = n /2 and b  = 2.  Hence, m = n and s2 = 2 n.",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-ProbabilityDistributionType",
  "property" : [ ],
  "codesystem" : "d6d32e85-8b65-5cc9-8d19-64893bcc5c28",
  "concept_id" : "9b4bd25c-6cb8-521d-94a6-a6397148fd89",
  "ancestors" : {
    "X2" : 0
  },
  "id" : "5d24ab61-3c67-4b07-b2d9-6a9c7611e0dc",
  "code" : "X2",
  "display" : "chi square",
  "version" : "2018-08-12"
}