The Round 4 Afrobarometer survey in Namibia was conducted between October 23 and December 3, 2008. Sixteen (16) Interviewers, and nine (4) Field Supervisors conducted the fieldwork using face-to-face interviews. The interviews were conducted in English and four local languages (Afrikaans, Oshiwambo, Otjiherero and Rukwangali) spoken by most nationals.
The sample was drawn by taking the smallest geographic units, census Enumeration Areas (EA’s) and stratifying all EA’s across the country into separate lists according to region and urban/ rural status. The Central Bureau of Statistics (CBS), Namibia created and maintains the sampling frame from which the Round Four sample was selected. This frame is based on the 2001 Population and Housing Census. The frame was updated in 2006 for high growth urban areas that resulted from urban migration. The sampling frame is stratified by 13 regions, and within regions by urban/rural locality. 150 EA’s were then randomly selected from these lists with the probability proportionate to its size in the overall population as represented in the 2001 Population and Housing Census. This ensured that every adult had an equal and known chance of being selected. Eight households were then randomly selected within each EA, and a respondent 18 years of age or older was randomly selected from each household. The gender of respondents was alternated during the interviews to ensure an equal gender quota.
In all, 1,200 Namibian were interviewed. A sample of this size is sufficient to yield an overall margin of error of approximately ± 3 percent at a confidence level of 95 percent.