A hospital sets up a billboard for its referral line in one city and in a second city it runs newspaper ads for its referral line in order to determine which media approach generates more telephone calls. This research method would be categorized as a:

The correct answer is observational

Observation is a constant source of knowledge for man about himself, others and the world around him. The observational method is one of the most used in the social sciences and has some curious aspects.

the process by which markets move to equilibrium is so predictable that economists sometimes refer to markets as being governed by the law of supply and demand.

Explanation: