Identify the study as an observational study or a designed experiment.
-In a group of 500 men and women, those who smoked did worse on tests of reaction time than those who did not smoke.
A)Designed experiment
B)Observational study

Question

Identify the study as an observational study or a designed experiment.
-In a group of 500 men and women, those who smoked did worse on tests of reaction time than those who did not smoke. 
A)Designed experiment
B)Observational study

Quizplus · Accepted Answer

This is an observational study because it involves observing and measuring specific characteristics without attempting to modify the subjects or their environment.

Identify the Study as an Observational Study or a Designed