Question 1
Identify the type of study most appropriate to the question.
What is the mean number of cars waiting for the green light at Main and Empire at rush hour (4:00 PM to 7:00 PM)?
◦ Experimental
◦ Retrospective observational
◦ Single-blind experimental
◦ Observational
Question 2
Identify the type of study most appropriate to the question.
Which of two home/work routes will result in the lower mean commute time?
◦ Retrospective observational
◦ Single-blind experimental
◦ Observational
◦ Experimental