Table of Contents  |  Search Technical Documentation  |  References

NAEP Sample Design → Sample Design for the 2000 Assessment → National Main Assessment Sample Design in 2000 → Sampling of Schools in the 2000 National Main Assessment → Assigning Measure of Size and Selecting School Samples for the 2000 National Main Assessment → Grade 8 Public School Sample for the 2000 National Main Assessment

NAEP Technical DocumentationGrade 8 Public School Sample for the 2000 National Main Assessment

			Distribution of Public Schools in the Sample by Sampling Strata

The eighth-grade national main public school sample was part of an integrated design with the eighth-grade state assessment sample. The integrated design allowed state and national main samples to be combined after data collection to produce a larger sample that would yield somewhat more precise state estimates and substantially more precise national estimates. In the grade 8 public school sample, states were treated as sampling strata, and a separate sample of schools was selected from most states. Forty-six jurisdictions, including 45 states and the combination of Department of Defense Domestic Dependent Elementary and Secondary Schools (DDESS) and Bureau of Indian Affairs (BIA) schools, were treated as separate strata, and a sample of schools was selected from each. Three geographic primary sampling units (PSUs) were selected from six low-population states (North Dakota, South Dakota, Alaska, Idaho, Montana, and Wyoming).

Schools on the grade 8 public school frame, within each explicit sampling stratum, were sorted in a serpentine fashion by the following:

1. School size for grade 8 public schools is a dichotomous variable defined as having at most 24 grade 8 students or at least 25 grade 8 students.

2. Urbanicity stratum is defined in terms of large or midsize central city, urban fringe of large or midsize city, large town, small town, and rural areas; separately within each sampling stratum, the CCD locale categories were collapsed to form urbanicity stratum.

3. Minority stratum is defined within urbanization strata using the two largest minority enrollment percentages among Black, Hispanic, Asian and Pacific Islander, and Native American in each district.

4. Minority status, whether the school was designated as high minority

5. Estimated grade enrollment, which approximates the number of students enrolled in the assessed grade

A target number of schools were selected from each of the sampling strata. The allocation of the sample schools for the nonsparse states was approximately proportional to the assigned measure of size, which included an adjustment to oversample high minority schools.

Printer-friendly Version