2311-Exercise-Set-6_1

determine if the study is an experiment or an observational study. Give a reason for your answer.

2311-Exercise-Set-6_1

12. A medical researcher is interested in testing a new medicine for migraine headaches. She selects an SRS of 100 adults who get migraines at a rate of one or more per week. Half of the selected adults will receive the new medicine while half will receive a placebo. The researcher will compare all results.