Question Completion Status: Moving to another question will save this response. Question 15 Determine whether the study is an observational study or an experimental study: A medical researcher randomly assigns 67 people with high blood pressure to a treatment group and 67 people with high blood pressure to a placebo group. The treatment group receives medication for three months and the placebo group receives a placebo for three months. Observational Study Experimental Study Moving to another question will save this response