Survey Methods
Pew Research Center
Spring 2013 Survey
Results for the surveys are based face-to-face interviews conducted under the direction of Princeton Survey Research Associates International. Survey results are based on national samples. For further details on sample designs, see below.
The descriptions below show the margin of sampling error based on all interviews conducted in that country. For results based on the full sample in a given country, one can say with 95% confidence that the error attributable to sampling and other random effects is plus or minus the margin of error. In addition to sampling error, one should bear in mind that question wording and practical difficulties in conducting surveys can introduce error or bias into the findings of opinion polls.
Country: | Ghana |
Sample design: | Multi-stage cluster sample stratified by region and settlement size |
Mode: | Face-to-face adults 18 plus |
Languages: | Akan (Twi), English, Dagbani, Ewe |
Fieldwork dates: | March 20 – April 3, 2013 |
Sample size: | 799 |
Margin of Error: | +/-4.7 percentage points |
Representative: | Adult population |
Country: | Kenya |
Sample design: | Multi-stage cluster sample stratified by province and settlement size |
Mode: | Face-to-face adults 18 plus |
Languages: | Kiswahili, English |
Fieldwork dates: | March 13 – March 30, 2013 |
Sample size: | 798 |
Margin of Error: | +/-4.3 percentage points |
Representative: | Adult population |
Country: | Nigeria |
Sample design: | Multi-stage cluster sample stratified by region and urbanity |
Mode: | Face-to-face adults 18 plus |
Languages: | English, Hausa, Yoruba, Igbo |
Fieldwork dates: | March 6 – April 4, 2013 |
Sample size: | 1,031 |
Margin of Error: | +/-4.0 percentage points |
Representative: | Adult population (excluding Borno, Yobe and some areas in Taraba, or about 5% of the population) |
Country: | Senegal |
Sample design: | Multi-stage cluster sample stratified by region and urbanity |
Mode: | Face-to-face adults 18 plus |
Languages: | Wolof, French |
Fieldwork dates: | March 6 – March 30, 2013 |
Sample size: | 800 |
Margin of Error: | +/-4.1 percentage points |
Representative: | Adult population |
Country: | South Africa |
Sample design: | Multi-stage cluster sample stratified by metropolitan area, province and urbanity |
Mode: | Face-to-face adults 18 plus |
Languages: | English, Zulu, Xhosa, South Sotho, Afrikaans |
Fieldwork dates: | March 18 – April 12, 2013 |
Sample size: | 815 |
Margin of Error: | +/-4.1 percentage points |
Representative: | Adult population |
Country: | Uganda |
Sample design: | Multi-stage cluster sample stratified by region and urbanity |
Mode: | Face-to-face adults 18 plus |
Languages: | Luganda, English, Runyankole/Rukiga, Luo, Runyoro/Rutoro, Ateso, Lugbara |
Fieldwork dates: | March 15 – March 29, 2013 |
Sample size: | 800 |
Margin of Error: | +/-4.3 percentage points |
Representative: | Adult population |