You can keep this list of exam questions. You may write on it if you wish. Each question has only 1 correct answer. Indicate your choice on the answer sheet. If you are stumped by a question, place a mark by it, and return to it later.
Many nurses are volunteers in a research project.
These nurses fill out forms regularly to report their dietary habits, how much or if they smoke, and how much they exercise. Data has been collected on this group for 20-25 years to track the incidence of disease in this group. This is a type of a. uncontrolled experiment. Experiments may take years to complete. Others must usually replicate your results.