A statistics student at a small liberal arts college who is curious about the relationship between the amount of time students at his college spend on social networking sites and their performance at school decides to conduct a survey. Four research strategies for collecting data are described below. In each, name the sampling method proposed and any bias you might expect.

He randomly chooses 3 floors of the largest dorm on campus and distributes a paper survey to each resident on those floors. He places a box in the common room of the dorm to collect the completed surveys.

1. What is the sampling method?

2. What type of bias would you expect? (check all that apply)

A. Nonresponse bias

B. Selection bias

C. Response bias

D. No bias in this survey