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Sampling from Lists for Comparison of Two Rates
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90 percent confidence adoption rate area units arises Casley and Lury census cluster sampling combining and splitting computed confidence level cost difference domain efficiency enumerator equal Evaluation of Agriculture example exit poll farmers farms favor fixed formal sampling formula given groups guessed value households or holdings identified informal sampling inquiry interview involved Leslie Kish listing operation margin of error method misunderstandings monitoring and evaluation nonsampling error number of adopters number of units percentage population possible practice problem procedure project participants proportional purpose question random number random selection reduce the sampling reduction in sampling sample design sample of holdings sampler sampling bias sampling fraction sampling frame sampling variance selection interval selection probabilities simple random sample specified statistical strata stratification stratified sampling stratum study variable survey systematic sample systematic selection tion total sample Two-Stage Sampling typical ultimate units unit selected unit sizes universe vary village World Bank