"variable in question" is correct and usable in written English.
You can use it whenever you want to refer to an unspecified thing or concept that is being asked about or discussed. For example, "The variable in question is how much money is required to fix the problem."
The string DEFAULT can be used to refer to the default set of types for the variable in question.
It provides a different visualization of the distribution of the probability for the random variable in question.
The benefits from stress-testing, however, depend critically on the assumptions which may themselves be biased about how much the variable in question will change.
The effect on agency depends on the outcome variable in question with the most significant increases be- ing in the ability to decide how many children to have.
On the assumption that the chaotic time history of a single variable in such an equation can be represented by the random superposition of deterministic structures, each being a single excursion around a homoclinic orbit, the power spectrum of the variable in question is predicted.
Adjusting input data by using prior knowledge of the dependencies of the project activities and cross analysis with related data that is easy to estimate would help to increase the accuracy of simulations when access to statistical data of the input variable in question is limited.
Such advice would ignore the fact that tiny variations in relative risk in observational studies provide no scientific basis for concluding either that those variations are causally related to the variable in question or that this risk would change if the variable were altered.
We acknowledge that parameters in discrete choice models rarely reflect the marginal impact of the variable in question.
It is then as if the variable in question were treated both as a dependent and as an independent variable.
One can formalize this paraphrase with restricted quantifiers, which incorporate a restriction on the domain over which the variable in question ranges.
But which sequences satisfy that formula depends on which sequences that differ from the original at most on the variable in question satisfy the formula the quantifier embeds.
