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NAEP Technical Documentation2012 Economics Assessment Sample Design

			Selection of Primary Sampling Units (PSU's) 2012 Public School Economics Assessment 2012 Private School Economics Assessment School and Student Participation Results

The NAEP 2012 sample design consisted of a nationally representative sample for operational assessments in economics at grade 12.

This was accomplished by designing separate sample components for public and private schools. The selected samples were based on a three-stage sample design:

• selection of primary sampling units (PSUs);
• selection of schools within strata; and
• selection of students within schools.

The samples of schools were selected with probability proportional to a measure of size based on the estimated twelfth-grade enrollment in the schools.

The target population included all students in public and private schools, including Bureau of Indian Education (BIE) and Department of Defense Domestic Dependent Elementary and Secondary Schools (DDESS), who were enrolled in twelfth grade at the time of assessment.

The table below shows the target student sample sizes of assessed students for each sample.

Target student sample sizes for grade 12 economics, by school type: 2012

School type	Target student sample size
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2012 Economics Assessment.
Public	9,000
Private	1,000

To reduce the burden on any particular school, efforts were made to minimize the overlap of the 2012 sample PSUs with the PSUs selected for the 2012 long-term trend sample, the 2008 arts sample, the 2008 long-term trend sample, the 2009 science sample, the 2010 civics, geography, and history samples, and the 2011 sample.

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