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Roper Through their Roper Reports Worldwide, GfK Roper conducts a global consumer survey to help...

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Roper Through their Roper Reports Worldwide, GfK Roper conducts a global consumer survey to help mul- tinational companies understand different consumer attitudes throughout the world. Within 30 countries, the researchers interview 1000 people aged 13-65. Their samples are designed so that they get 500 males and 500 females in each country. (www.gfkamerica.com) a) Are they using a simple random sample? Explain. b) What kind of design do you think they are using?

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