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Sample Size Determination for O/D Estimation under Budget Constraint  

Sin, Hui-Cheol (한국교통연구원 국가교통DB센터)
Lee, Hyang-Suk (한국교통연구원 국가교통DB센터)
Publication Information
Journal of Korean Society of Transportation / v.24, no.3, 2006 , pp. 7-15 More about this Journal
Abstract
A large sample can Provide more information about the Population. As the sample size Increases, analysts will be more confident about the survey results. On the other hand, the costs for survey will increase in time and manpower. Therefore, determination of the sample size is a trade-off between the required accuracy and the cost. In addition, permitted error and significance level should be considered. Sample size determination in surveys for O/D estimation is also connected with confidence of survey result. However, the past methods were usually too simple to consider confidence. Therefore, a new method for O/D surveys was Proposed and it was accurate enough, but it has too large sample size when we have current budget constraint. In this research, several minimum sample size determination methods for origin-destination survey under budget constraint were proposed. Each method decreased sample size, but has its own advantages. Selection of the sample size will depend on the study Purpose and budget constraint.
Keywords
zero cell;
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