About: http://webisa.webdatacommons.org/79473206

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	As you say, if T is normal, then the ratio would never be undetectable, but rather within the reference range or outside that expected ratio (for this test that is 3 standard deviations or ~=99.73% certainty).
http://www.w3.org/ns/prov#wasQuotedFrom	corante.com