The phrase "a range of variables" is correct and usable in written English.
You can use it in any situation where you need to refer to a specific set of possibilities or options. For example: "The psychology study looked at a range of variables, including age, gender, and education level."
These results, as well as other studies, suggest that future biodiversity experiments need to include a range of variable environments [29] or better account for the natural variability that occurs in ecosystems at the local scale.
Shore and Rapport (1998) [26] found different levels of social anxiety across cultures, with a range of variable social fears.
Jolie, equipped with a range of variable English accents, is imposing in buffalo horns, black leather and super-chiselled prosthetic cheekbones – all the better for shooting contemptuous looks at Elle Fanning's rosily insipid ingenue.
The objective is to determine the MRR in terms of the process parameters such as cutting speed and grinding power over a range of variable wheel diameters.
Contemporary prosthetic designs for replacement of the proximal humerus offer a range of variable geometry aiming for restoration of the anatomy.
The carried out research involved the longitudinal turning tests of duplex stainless steel, conducted in a range of variable cutting speeds vc and feeds f.
Van Ham co-authored the study, which measured a range of variables associated with segregation: income, occupational status, education and more.
Greater Manchester ranked 30th, performing more consistently across a range of variables including work-life balance, housing affordability and new businesses.
Psycholinguistic research has documented a range of variables that influence visual word recognition performance.
Fares have a range of variables: the array of airlines serving the route, the number of daily flights, connecting flights and dozens of airline rules (things like passenger eligibility, seasonal restrictions and advance-purchase requirements).
A team of researchers looked at 22 studies from nine countries and found 18 that showed a marked link between continuity of care and lower death rates, after correcting for a range of variables.
