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What is the difference between a control treatment and a control group? 2. What is blinding? 3. What is the difference between a single-blind experiment

What is the difference between a "control treatment" and a "control group?"

2. What is "blinding?"

3. What is the difference between a "single-blind" experiment and a "double-blind" experiment?

4. What is a placebo?

5. What is blocking?

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