{
  "package" : "hl7.terminology@6.3.0",
  "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" : [ {
    "_uri" : "http://hl7.org/fhir/concept-properties#status",
    "code" : "status",
    "valueCode" : "active"
  }, {
    "_uri" : "http://terminology.hl7.org/CodeSystem/utg-concept-properties#v3-internal-id",
    "code" : "internalId",
    "valueCode" : "10753"
  } ],
  "codesystem" : "bb526314-905c-5b99-b5d7-f5ac37875342",
  "concept_id" : "9b4bd25c-6cb8-521d-94a6-a6397148fd89",
  "ancestors" : {
    "X2" : 0
  },
  "id" : "a2083192-318f-4fb0-9432-f216b607c395",
  "code" : "X2",
  "display" : "chi square",
  "version" : "3.0.0"
}