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control group |
Also found in: Dictionary/thesaurus, Medical, Legal, Financial, Wikipedia, Hutchinson | 0.04 sec. |
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control group [kən′trōl ‚grüp] (statistics) A sample in which a factor whose effect is being estimated is absent or is held constant, in order to provide a comparison. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Founded in 1906 by Austrian emigre Louis Turen, Control Group has evolved from a one-man window washing service into one of the nation's leading privately-owned facility maintenance service companies. They mailed the control group quarterly newsletters about eating right and exercising. There were 57 participants in the study--32 in the control group, who received standard treatment, including medications; and 25 in the test group, who received both standard and osteopathic treatments. |
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