Ray is comparing the heart rates of a group of former smokers to non-smokers after they have walked on a treadmill for 15 minutes.This would be an example of a

Name: Ray is comparing the heart rates of a group of former smokers to non-smokers after they have walked on a treadmill for 15 minutes.This would be an example of a
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Question

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Ray's study does not randomly assign participants to the former smoker or non-smoker groups, making it a quasi-experimental design rather than a true experiment.

Ray Is Comparing the Heart Rates of a Group of Former