Pew. Pew Research Center publishes polls on important issues in news and about global life at its website, www.pewglobal.org. In a survey summary, you can find the information as below:

Country: Turkey; Sample design: Multistage, area probability design. Primary sampling units (PSUs) are household blocks stratified by region (NUTS2) and urbanity. The number of PSUs selected is 100.

Individuals within households are selected using computer randomization based on all 18+ people living in the household. Up to three attempts are made to complete the interview with the selected respondent.; Mode: Face-to-face; Languages:

Turkish; Fieldwork dates: July 11–August 7, 2019; Sample size:

1,046; Margin of Error: 4.5 percentage points; Representative:

Adult population 18 plus. (https://pewrsr.ch/3h3PjZH)

a) Explain the multistage design applied in terms of regions and municipalities.

b) What sampling frame might have been used? Does this seem representative of the population?