Mathematics, 01.04.2021 20:30 Kittylover65

ersonal trainer wishes to study the effect of cardio exercise versus weight lifting on resting heart rate. He randomly selects five people at the gym who self identify as exclusively doing cardio, and he randomly selects five more people at the gym who self identify as exclusively doing weight lifting. He then measures and compares the two groups' resting heart rates. Is this an experiment or an observational study

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