Examlex
When tax filings increase faster than increases in population, and when nearly all the extra filings are from individuals in the lower 99 percent income group
Levels
Distinct values that a categorical variable can have. In experimental design, it also refers to the treatments or conditions to which subjects are assigned.
Independent Variable
A factor or condition that is manipulated by the researcher to observe its effect on the dependent variable in an experiment.
Combinations
The selection of items from a larger set such that the order of selection does not matter.
Levels
Refers to the different values or categories of a variable in a study or analysis.
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