Examlex
A barter system of payment is
Independent Variable
The variable in an experiment that is manipulated or changed to observe its effect on a dependent variable.
Control Variables
Factors in an experiment that are kept constant to test the relative impact of the independent variable.
Control Group
In an experiment, the group that does not receive the treatment and is used as a benchmark to measure how the other tested groups compare.
Music
A form of art that uses sound organized in time, often combining vocal or instrumental sounds to produce harmony, rhythm, and expression of emotion.
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