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OpenStudy (darrenmadx):
Question 17 of 20 5.0 Points An experiment in which only one variable is changed is a(an) __________ experiment. A. randomized B. natural C. double blind D. controlled
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OpenStudy (rushwr):
I think it is controlled. D is the answer as to what I know
OpenStudy (darrenmadx):
okay. then i'll go with D. Thanks
OpenStudy (rushwr):
Controlled Experiment is an experiment in which only one variable is manipulated at a time.
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