NAEP Assessment Sample Design → NAEP 2011 Sample Design → Sample Design for the 2011 National Assessment → 2011 Writing Computer-Based Assessment (WCBA) → Public School 2011 Writing Computer-Based Assessment (WCBA) → Sampling Frame for the Public School 2011 Writing Computer-Based Assessment (WCBA) → Eighth- and Twelfth-Grade Schools and Enrollment in the Public School WCBA Sampling Frame

NAEP Technical DocumentationEighth- and Twelfth-Grade Schools and Enrollment in the Public School WCBA Sampling Frame

The following table presents the number of schools and estimated enrollment for the public school frame for grades 8 and 12. The unweighted estimated enrollment is restricted to the selected primary sampling units (PSUs). The weighted estimated enrollment incorporates the PSU weight (inverse of the probability of selecting the PSU), and thus is a national estimate of the number of public school students in each grade.

Number of schools and enrollment in public school sampling frame, writing computer-based assessment (WCBA), by grade: 2011

Grade	School count in sampled PSUs	Estimated enrollment  (unweighted)	Estimated enrollment (weighted)
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2011 Writing Computer-Based Assessment.
8	11,379	1,952,079	3,635,336
12	9,068	1,833,707	3,423,860

 

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