Question

A national restaurant chain’s owners are trying to decide whether they want to open up a franchise in your town. To help them make this decision, they want to find out how often people in your town go out to eat. A researcher interviews people as they leave a local restaurant. a. What is the sampling method being used? b. Is this a biased or unbiased sample?

Answer 1

Convenience sampling.
It's biased, they are only sampling people who are eating out at the time. It leaves out those not currently at the restaurant.