From 13 to 23 February 2013, the Afrobarometer surveyed a nationally representative, random, stratified probability sample of 1200 adult Sudanese. Face-to-face interviews were conducted in Arabic by the Afrobarometer team based at the Survey Polling and Statistical Studies Center. Arab Barometer and the Arab Reform Initiative provided technical backstopping for the survey. This was the first Afrobarometer survey in Sudan.
The sample was drawn by taking the smallest geographic units, Census Enumeration Areas (EAs), and stratifying all EAs across the country into separate lists according to region and geographical area (urban/rural). 120 EAs were then randomly selected from these lists with the probability proportionate to its size in the overall population as represented in the 2010 population projections based on the 2008 Sudan population census as provided by the Sudan Statistics Bureau. This ensured that every eligible adult had an equal and known chance of being selected. Ten households were then randomly selected within each EA, and a respondent 18 years of age or older was randomly selected from each household. A gender quota ensured that every other interview must be with a female. A sample of this size is sufficient to yield an overall margin of error of +/-2.8 percent at a confidence level of 95 percent.
