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Twenty Sprint Cyclists Were Randomly Selected to Be in a Study

question 94

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Twenty sprint cyclists were randomly selected to be in a study designed to test the effectiveness of 12 weeks of creatine supplementation on performance. Ten cyclists received a creatine supplement for three months while the other ten received a placebo. The cyclists did not know which supplement they were taking, while the researcher did have this information. This is an example of a(n) ____ study.


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