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11 October, 22:27

In an experiment there should be only one

A. control.

B. dependent variable.

C. independent variable.

D. All answers are correct.

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Answers (1)
  1. 11 October, 22:33
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    In an experiment, these should be only one independent variable. It is the one that doesn't change, whereas you manipulate the dependent variable to test your hypothesis.
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