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fundai! fundai!
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6 years ago
A clinic gives a drug to a group of ten patients and a placebo to another group of ten patients to find out if the drug has an effect on the patients' illness.
 
  A) Observational B) Experimental
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takirahh_takirahh_
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fundai! Author
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This calls for a celebration Person Raising Both Hands in Celebration
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Good timing, thanks!
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This helped my grade so much Perfect
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