Explain whether an experiment or an observational study would be more appropriate to investigate whether acupuncture can help people to heal from sports-related injuries.
Experiment; an observational study would take too long.
Observational study; it would be easier to control for the effects of lurking variables such as exercise.
Observational study; an experiment would take too long.
Experiment; it would be easier to control for the effects of lurking variables such as exercise.
Experiment; it would be unethical to subject people to a potentially harmful treatment over a long period of time.