Why is it important to alter only one variable at a time when designing and experiment?

Question

Jamir Marsh

Biology

8 September, 13:29

Why is it important to alter only one variable at a time when designing and experiment?

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Ariel Mora · Answer 1

Answer: A variable within a scientific experiment is something that is changed (i. e. it varies). There should be only one manipulated variable within a scientific experiment so that the experimenter can be certain it is this variable which causes a pattern in the resultant data, if any exists at all.