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Romashka-Z-Leto [24]
2 years ago
14

( 0 0

Mathematics
1 answer:
ch4aika [34]2 years ago
7 0
<h2>D. If subjects knew they were receiving an active treatment, researchers would not have known if any improvement was due to the new medication or to the expectation of <u>feeling </u>better. If the researchers knew which subjects received which treatments, they might have treated one group of subjects differently from the other group.</h2><h2 />

For your question... the answer would be D

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