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Sagot :
Final answer:
The study is an experiment as one group received a treatment (experimental drug) to observe its effect, distinguishing it from observational studies.
Explanation:
An experiment involves researchers applying a treatment to a group of subjects to observe its effect on an outcome variable. In this case, one group of leukemia patients received an experimental drug, while the other group did not, to measure the drug's impact on energy levels.
Observational studies, on the other hand, do not involve manipulating variables. Researchers in such studies observe naturally occurring phenomena without applying any treatments or interventions.
Comparing the groups based on the treatment given establishes the distinction between an experiment and an observational study.
Learn more about Experimental Studies vs. Observational Studies here:
https://brainly.com/question/34659529
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