NAEP Technical DocumentationSampling of Schools for the 2013 Twelfth-Grade Public School National Assessment

			Computation of Measures of Size School Sample Sizes: Frame and New School

For the twelfth-grade public school assessment sample, schools were sampled independently from each sampling stratum with probability proportional to size using systematic sampling. Prior to sampling, schools in each sampling stratum were sorted by the appropriate implicit stratification variables in a serpentine order. A school's measure of size was a complex function of the school's estimated grade enrollment. As with the grades 4 and 8 public school state assessment samples, multiple hits were allowed for each school in the state-based sampling strata, but not in the remainder stratum containing the schools in the remaining states and District of Columbia.

The sampled schools for the twelfth-grade public school assessment came from two frames: the public school sample frame (as constructed from the Common Core of Data (CCD) and the new-school sampling frame.

For the CCD-based school frame, schools in the state-based sampling strata were sampled at a rate that would yield 4,600 assessed students per stratum. Schools in the remainder stratum were sampled at a rate that would yield a national sample of 26,100 assessed students.

The schools in the new school frame were sampled at the same rate as the CCD-based school frame.

Printer-friendly Version