Chemistry, 11.09.2019 23:20 mollybeale
Adrug company performed a study to test the effectiveness of a new headache medicine. the researchers grouped the patients into two different groups. one group was given the pills that contained the new medicine. the other group were given pills that did not contain the new medicine. why did the researchers not tell the patients which pill they were given?
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Adrug company performed a study to test the effectiveness of a new headache medicine. the researcher...
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