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NAEP Technical DocumentationComparisons of the 2000 and 2002 National Sampling Frames

The NAEP 2000 and 2002 school samples were derived primarily from the Common Core of Data (CCD) and Private School Survey (PSS) frames. The NAEP 2000 school frame was derived from the 1997–98 CCD and the 1997–98 PSS. The NAEP 2002 school frame was derived from the 1999–2000 CCD and the 1999-2000 PSS.

This page summarizes comparisons of the frames for the twelfth-grade public school sample (from the CCD) and for the fourth-, eighth-, and twelfth-grade private school samples from the PSS. Similar comparisons for the state assessment can be found on the page Comparisons of the 2000 and 2002 State Sampling Frames. Comparisons occur among such sociodemographic variables as minority status (Black, Hispanic, Asian/Pacific Islander, and American Indian), median income,¹ and type of location. The race/ethnicity percentages come from the CCD or PSS records for each school. Type of location is the urbanicity variable treated as an interval variable. (Type of location defined as an interval variable is 1=center of large city, 2=center of mid-size city, 3=urban fringe of large city, 4=urban fringe of mid-size city, 5=large town, 6=small town, 7=rural area, 8=rural area in Metropolitan Statistical Area (MSA). A mean value of 6.0 for example can mean all in small town, or half in urban fringe of mid-size city and half in rural area of MSA stratum.) The tabulations are weighted tabulations over the schools in the frame for that NAEP region, with the weight equal to the estimated grade enrollment.

For each sociodemographic characteristic, the 2000 frame, the 2002 frame, and the difference between the 2002 frame and 2000 frame figures were calculated by state-based NAEP region. These differences can be summarized for twelfth-grade public schools as follows:

• The proportion of Black students enrolled in the twelfth grade was higher in 2002 as compared to 2000 in all NAEP regions other than the Southeast (15.5 percent in 2000 and 16.3 percent in 2002 overall).

• The overall Hispanic enrollment was higher for twelfth grade in 2002 as compared to 2000 (12.5 percent in 2000 and 14.5 percent in 2002), with the same pattern in all four regions.

• The overall Asian/Pacific Islander enrollment was slightly lower for twelfth grade in 2002 as compared to 2000 (4.2 percent in 2000 and 3.8 percent in 2002).

• The overall American Indian percentage was slightly higher for twelfth grade in 2002 as compared to 2000 (1.1 percent in 2000 and 1.2 percent in 2002).

• Overall mean type of location is higher for twelfth grade in 2002 (3.6 in 2000 and 3.9 in 2002). This represents a higher 'degree of nonurbanicity' in the 2002 frame as compared to the 2000 frame.

One can note that these patterns are similar to those public school patterns seen for fourth and eighth grades (see Comparisons of the 2000 and 2002 State Sampling Frames).

For private schools for all three grades, the only nontrivial differences were as follows:

• The overall percentage of Black students enrolled in the twelfth grade dropped 0.24 percentage points from 2000 to 2002.

• The overall percentage of Hispanic students enrolled in fourth and eighth grades rose more than 0.50 percentage points.

¹Median income was also compared, with tiny differences. The overall change for public schools was $10 ($32,258 in 2000; $32,248 in 2002). Note that in both 2000 and 2002 the numbers are actually 1990 median income for the locality.

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