PMC:7795972 / 8217-8371 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T64","span":{"begin":0,"end":154},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The Pearson’s chi square test was used in order to determine the statistical significance of contingency tables on which graphic presentations were based."}