Population selection is critical to the internal validity of the study.
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Q25: The placebo arm is the clinical trial
Q26: Use of placebos and shams allows you
Q27: A disadvantage of simple randomization is that
Q28: One of the disadvantages of using stratified
Q29: The advantage of using the group allocation
Q31: Intent-to-treat is when a researcher analyzes only
Q32: Control event rate is the rate in
Q33: The study design where there is a
Q34: The key limitation of this study design
Q35: The study where every participant receives all
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