Write the word or phrase that best completes each statement or answers the question.
Tell whether correlation is being used correctly. Identify any statistical errors.
-In a clinical trial, 780 participants suffering from high blood pressure were randomly assigned to one of three groups. The first group received a blood pressure medication, the second group received a placebo, and the
Third group received no treatment. The change in blood pressure over a two-month period was recorded for
Each participant.
A) Observational study
B) Experiment