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16 January, 12:45

Emilios teacher told his class that a controlled experiments results are valid only if one factor in the experiment is changed and all the other factors remain constant. Why is this statement true?

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  1. Z
    16 January, 15:03
    0
    When only one factor is changed, you can be more certain that it caused the results.

    Explanation:

    A controlled experiment is usually performed to determine the effect of a certain factor. If more than one factor is changed in a single experiment, then we won't be able o determine which factor was responsible for bringing the change in our experiment. Hence, it is important that in controlled experiments, we study one factor at a time. Study of more than one factor will not give reliable results.
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