The phrase "a combination of variables" is correct and usable in written English.
It can be used in contexts such as mathematics, statistics, or any field where different factors or elements are being considered together.
Example: "In this experiment, we will analyze the effects of a combination of variables on the outcome of the study."
Alternatives: "a mix of factors" or "a blend of elements".
In most cases the available data do not inform variability from a single variable but from a combination of variables involved in the steps from exposure to apical response.
Discriminant analysis (DA) was performed on data of two combined hormonal contraceptives (CHC) differing in estrogen ratio to explore whether a combination of variables rather than a single variable distinguishes CHCs better.
One parameter, such as temperature tolerance, may be important in determining the limits of distribution, but often a combination of variables, such as temperature tolerance and water requirements, is important.
A descriptive analysis was performed and data analyzed through a combination of variables in eight overarching categories relevant to emergency care.
They include gender, age (in categories), socio-professional status, holding of a driving license, and a combination of variables which describe the role of the individual (head, spouse or child) and the household structure (single or couple; with child under 12 or not; zero, one or two workers).
The patterns we observed may be explained differently, depending on the taxonomic group and can be due to a combination of variables as described above.
The statistical discrepancy, he said, was a combination of variable luck — balls that once dropped in for hits were being caught — and the law of averages taking hold.
Fiat is expected to start using Multiair engines in its cars in a year or so.Using a combination of variable valve-control, fuel injection and turbocharging, Daimler is developing an entirely new type of engine.
The final descriptors of the predictive model were obtained by using a combination of variable selection method and domain knowledge.
The chapter concludes with the design specifics and evaluation of a through-shaft angle sensor that employs a combination of variable reluctance technique and Hall sensor.
In this paper, careful consideration is paid to the Ultimate Limit State (ULS) resistance verification of structural glass elements under a combination of variable loads with assigned duration.
