Use the following information for questions:
Decide if the study is an observational study or an experiment.
-A medicine to remove the redness in eyes was tested in a group of 100 students. Each student took the medicine in one eye and a placebo in the other eye. The eye (left or right) that received the placebo was decided by flipping a coin.
A) Observational Study
B) Experiment

Question

Use the following information for questions:
 Decide if the study is an observational study or an experiment.
-A medicine to remove the redness in eyes was tested in a group of 100 students. Each student took the medicine in one eye and a placebo in the other eye. The eye (left or right) that received the placebo was decided by flipping a coin.
A) Observational Study
B) Experiment

Quizplus · Accepted Answer

This is an experiment because the researchers are actively intervening by applying treatments (the medicine and the placebo) to the subjects (the students) and controlling the assignment of treatments to each eye through randomization (coin flip).

Use the Following Information for Questions