This report includes five studies: An Empirical Study of Poststratified Estimator, BRR Variance Estimation Using VPLX Hadamard Procedure, An Alternative Jackknife Variance Estimation for NAEP, On the Performance of Replication-based Variance Estimation Mathods with Small Numbers of PSUs, and An Empirical Study of the Limitation of Using SUDAAN for Variance Estimation.
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