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Not What You Meant?  There are 30 definitions for Control.

Controlling for a variable

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Controlling for a variable means to deliberately vary the experimental conditions in order to take that variable into account in the prediction of the response variable. Controlling tends to reduce the experimental error. something that does not change in the experiment

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Controlling for a variable from Wíkipedia. ©2006 by Wíkipedia. Licensed under the GNU Free Documentation License. View a list of authors or edit this article.

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