As discussed in the chapter, GfK Roper Consulting con-ducts a global consumer survey to help multinational companies understand different consumer attitudes throughout the world. In India, the researchers interviewed 1000 people aged 13-65 (www.gfkamerica.com). Their sample is designed so that they get 500 males and 500 females.
a) Are they using a simple random sample? How do you know?
b) What kind of design do you think they are using?