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A pharmaceutical company tests a new allergy medication. They randomly assign 100 patients to receive either the new medication or a placebo. After 2 weeks, they measure symptom relief in both groups. However, they forgot to instruct patients to avoid eating dairy, which is known to worsen symptoms. Which statement best describes this situation?
A pharmaceutical company tests a new allergy medication. They randomly assign 100 patients to receive either the new medication or a placebo. After 2 weeks, they measure symptom relief in both groups. However, they forgot to instruct patients to avoid eating dairy, which is known to worsen symptoms. Which statement best describes this situation?