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Direct linkHahs-Vaughn, Debbie L.; McWayne, Christine M.; Bulotsky-Shearer, Rebecca J.; Wen, Xiaoli; Faria, Ann-Marie – Evaluation Review, 2011
Complex survey data are collected by means other than simple random samples. This creates two analytical issues: nonindependence and unequal selection probability. Failing to address these issues results in underestimated standard errors and biased parameter estimates. Using data from the nationally representative Head Start Family and Child…
Descriptors: Research Methodology, Disadvantaged Youth, Probability, Early Intervention
