Do the following data come from an experiment or an observational study? A gene called ACTN3 encodes a protein which functions in fast-twitch muscles. Some people have a variant of this gene that cannot yield this protein. (So we might call the gene variant a possible non-sprinting gene.) To address the question of whether this gene is associated with sprinting ability, geneticists tested people from three different groups: world-class sprinters, world-class marathon runners, and a control group of non-athletes. In the samples tested, of the sprinters had the gene variant, compared with of the non-athletes and of the marathon runners. This study1 suggests that sprinters are less likely than non-sprinters to have the gene variant.(A) Experiment(B) Observational study
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Do the following data come from an experiment or an observational study? A gene called ACTN3 encodes...
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