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Dahasolnce [82]
3 years ago
12

What is a test variable? Give an example

Biology
1 answer:
babunello [35]3 years ago
4 0
If a scientist conducts an experiment to test the theory that a vitamin could extend a person's life-expectancy, then: The independent variable is the amount of vitamin that is given to the subjects within the experiment. This is controlled by the experimenting scientist.
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