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When conducting an experiment for a new heart burn medicine, researchers randomly assigned patients to take either the new drug, an existing heart burn medication,

When conducting an experiment for a new heart burn medicine, researchers randomly assigned patients to take either the new drug, an existing heart burn medication, or a placebo. All medications looked the same, and patients were not told which one they received.

Was this experiment blinded?

  • fertilizer
  • fields of corn
  • old fertilizer and new fertilizer
  • yield of corn

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