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NAEP Technical DocumentationSchools and Enrollment in Public School for the 2012 Economic Assessment

The following table presents the number of schools and estimated enrollment for the public school frame for grade12. 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 grade 12.

Number of schools and enrollment in public school sampling frame, economics assessment, grade 12: 2012

Grade	School count in sampled PSUs	Estimated enrollment (unweighted)	Estimated enrollment (weighted)
NOTE: PSU = primary sampling unit. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2012 Economics Assessment.
12	7,300	1,600,000	3,490,000

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