2002 NSAF Variance Estimation

Technical Paper

2002 NSAF Variance Estimation

February 1, 2004

Abstract

This report describes the methods and estimated sampling errors for statistics from the 2002 survey. Sections of the report provide an overview of the sample design, summarize the precision of the survey estimates, and discuss the computation of sampling error estimates for differences estimated from NSAF data. A general review of the two main methods of computing sampling errors of estimates from surveys with complex survey designs is also presented, including a detailed discussion of the replication method of variance estimation and an overview of available software available for computing sampling errors.

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