The primary purpose of random assignment in a clinical trial is to    help ensure that study subjects are representative of the population   help reduce detection bias   help ensure the study groups are comparable pre-intervention   facilitate adherence to the intervention   facilitate measurement of the outcome variable   all of the above

Question

The primary purpose of random assignment in a clinical trial is to 

 

help ensure that study subjects are representative of the population

 

help reduce detection bias

 

help ensure the study groups are comparable pre-intervention

 

facilitate adherence to the intervention

 

facilitate measurement of the outcome variable

 

all of the above

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