Question:

Which of the following techniques yields a simple random sample

A.

choosing volunteers from an introductory psychology class to participate

B.

listing the individuals by ethnic group and choosing a proportion from within each ethnic group at random

C.

numbering all the elements of a sampling frame and then using a random number table to pick cases from the table

D.

randomly selecting schools, and then sampling everyone within the school

Answer» c. numbering all the elements of a sampling frame and then using a random number table to pick cases from the table