A sample that is treated exactly like the other experimental groups except that the variable is not applied to it is a(n) _____.

1 answer:

7 0

This is a "control" - answer c).

You always need a control in an experiment, otherwise you don't know what influenced the changes. Imagine you make children eat more vegetables and they grow - do you know if it's due to vegetables or not? You need to have another group that eats normal amounts of vegetables to compare this.
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dmitriy555 [2]

The total time is (1h=3600 s):
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