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Test variables are the factors that are intentionally changed or manipulated by the researcher in an experiment, whereas outcome variables are the factors that are measured and affected by the test variables. Test variables are the independent variables that are controlled by the researcher, while outcome variables are the dependent variables that change in response to the test variables. The relationship between the test variables and outcome variables is explored to determine the effect of the test variables on the outcome variables.
The test variable (independent variable) controls the outcome variable (dependent variable).
to isolate and test single variables
As many as you need. You can't change more than one if you want accurate results.
An experiment of any kind can have infinitely many variables. A controlled experiment can have just as many, provided that all but one are kept exactly the same.
he sucked balls and he was gay
The trick to designing a good experiment is to figure out a way for it to test the effects of only one variable, and to avoid any effects of others.
it is a fair test
Variables that do not change in an experiment are independent variables.
Variables that do not change in an experiment are independent variables.
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