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Statistics 18 Online
OpenStudy (anonymous):

Confounding _____. A. occurs in an experiment when you are not able to distinguish among the effects of different factors. B. is a technique in which a subject doesn't know whether he or she is receiving a treatment or a placebo. C. is the repetition of an experiment on more than one subject. D. is used when subjects are assigned to different groups through a process of random selection.

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