You decide to test the effectiveness using the drug and a placebo. You select a select a group of 500 subjects and randomly assign them to either the treatment group or the placebo group.
- Is this an observational study or a designed experiment? Explain
- What is the explanatory variable?
- What is the response variable?
- If this is an experiment, diagram the experiment.
- You decide to "double blind" the study. What does that mean?