In October—November 2008, the Afrobarometer surveyed a nationally representative, random, stratified probability sample of 1,104 Kenyans. 1 Face-to-face interviews were conducted in the language of the respondent’s choice by the Afrobarometer team based at the Institute for Development Studies (IDS), University of Nairobi. 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 province and urban or rural status. 142 EAs were then randomly selected from these lists with the probability proportionate to its size in the overall population as represented in a 2008 updated population projection by the Kenya National Bureau of Statistics (KNBS) based on the 1999 census.2 This ensured that every eligible 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. 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 +/- 3 percent at a confidence level of 95 percent.
