Use randomized-experiment data and simulations to compare treatments and judge significance.
Identify experimental conditions, unit, response, and contrast
Problem
Patients are randomly assigned a new drug or placebo, and pain score is measured. Identify the treatment, control, experimental unit, response, and treatment-minus-control comparison.
Big Picture
What this problem is really about
Read an experiment as who receives what and what is measured afterward. The treatment and control are assigned conditions, the experimental unit is the smallest entity independently assigned, and the response is the measured outcome. Define the group contrast in a stated order, because reversing treatment minus control reverses the sign and its interpretation.
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