Significado de Categoria - 1. classe de coisas - https://www.lexico.pt/categoria/
range: https://www.google.com/search?client=avast&ei=3mgQYJCjBpL2xg... set of different things of the same general type
Separe seus objetos por categoria e não por cômodos - https://wikihaus.com.br/blog/konmari-metodo-de-organizacao-p...
range - variações - https://pt.bab.la/dicionario/ingles-portugues/range

Fernanda, realmente um maior contexto seria o ideal. Todavia, analisando um poucvo mais, acredito que possa se referir às administrações de doses, que fazem parte do estudo clínico. Dê uma analisada...
Dose-ranging study
From Wikipedia, the free encyclopedia
Jump to navigationJump to search
A dose-ranging study is a clinical trial where different doses of an agent (e.g. a drug) are tested against each other to establish which dose works best and/or is least harmful.

Dose-ranging is usually a phase I or early phase II clinical trial. Typically a dose ranging study will include a placebo group of subjects, and a few groups that receive different doses of the test drug. For instance, a typical dose-ranging study may include four groups: a placebo group, low-dose group, medium-dose group and a high-dose group. The maximum tolerable dose (MTD) information is necessary to be able to design such groups and therefore dose-ranging studies are usually designed after the availability of MTD information.[

https://en.wikipedia.org/wiki/Dose-ranging_study#cite_note-1