realized in
is concretized as
statistical variable
inferential statistical data analysis
independent variable
Jie Zheng, Yongqun He, Barry Smith
A statistical variable that is manipulated or controlled in a scientific study to test its effect on a dependent variable(s).
WEB: http://en.wikipedia.org/wiki/Dependent_and_independent_variables
https://www.thoughtco.com/i-ndpendent-and-dependent-variables-differences-606115