    Sentence.4:if the \datas froma  series, of tests»performed:.with  the: same }. toxicant, toxicant,    concentrations, and test  species;—iwere. . analyzed--.with  hypothesis -tésts,° -précision    could ‘only:be. assessed by.a  qualitative -.comparison:\of \the  NQEC-LOEG intervals; withthe  understanding\. that, maximum  pretision would:be attained if-all.  tests yielded. .the\ same NOEC-  LOEC ‘interval.