A researcher wants to study the effects of advertising by female models upon high school boys in small Midwestern towns. The research methodology calls for selecting several small Midwestern towns that have high schools. What is the frame for this study?
◦ high school students from the small Midwestern towns selected
◦ all students attending high school from small Midwestern towns
◦ all high school boys from small Midwestern towns
◦ high school boys from the small Midwestern towns selected