Researchers are evaluating a new energy drink's effect on athletic performance. They recruit 200 200 college athletes and randomly assign them to two groups. One group receives the energy drink, while the other receives a flavored beverage that looks and tastes the same but contains no active ingredients. Both groups drink their assigned beverage before workouts for one month. Coaches record performance data. How can this experiment be designed to be double-blind?

Neither the athletes nor the coaches know which group receives the energy drink or placebo

Only the athletes know which drink they receive

Only the coaches know which group receives the energy drink

Both groups are told which beverage they are consuming

Researchers are evaluating a new energy drink's effect on athleti...

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