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NAEP Sample Design → NAEP 2002 Sample Design → 2002 State Assessment Sample Design → Sampling Frame for the 2002 State Assessment → Comparisons of the 2000 and 2002 State Sampling Frames

NAEP Technical DocumentationComparisons of 2000 and 2002 State Sampling Frames

The 2000 and 2002 state school samples were derived primarily from the Common Core of Data (CCD). The 2000 school frame for NAEP was derived from the 1997–1998 CCD. The NAEP 2002 school frame was derived from the 1999–2000 CCD.

Comparisons of the CCD frames for the fourth- and eighth-grade public school samples occur by grade among such sociodemographic variables as race/ethnicity variables (i.e., Black, Hispanic, and Asian/Pacific Islander), median income, and type of location. The race/ethnicity percentages come from the CCD records for each school. Median income is for the zip code containing the school, obtained from the 1990 Census. Type of location is the urbanicity variable defined 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 not in Metropolitan Statistical Area (non-MSA), 8=rural area in Metropolitan Statistical Area (MSA). For example, a mean value of 6.0 can mean all in small town, or half in urban fringe of mid-size city and half in rural area of MSA stratum.) For each grade, the tabulations are weighted to reflect enrollment in the schools in the frame for that jurisdiction.

For the U.S. public school population as a whole (including territories participating in at least one grade for State NAEP), the following differences were found:

• The overall Black percentages were slightly lower for both fourth and eighth grades in 2002 as compared to 2000 (lower by 0.23 percentage points for fourth grade and lower by 0.11 percentage points for eighth grade.)

• The overall Hispanic percentages were higher for both fourth and eighth grade public schools in 2002 as compared to 2000 (higher by 1.23 percentage points for fourth grade and higher by 1.08 percentage points for eighth grade.)

• Mean type of location was higher for both fourth and eighth grades for 2002 as compared to 2000, reflecting a higher 'degree of nonurbanicity' for the 2002 frame as compared to the 2000 frame (for fourth grade, 3.50 in 2000 and 3.90 in 2002; for eighth grade, 3.57 in 2000 and 3.95 in 2002).

Checking individual states and jurisdictions, there were differences between the 2000 and 2002 fourth- and eighth-grade public school sampling frames, but none that were considerably different from the overall pattern for the country. For the most part, the frames showed minor differences for individual jurisdictions; differences appeared to reflect either variation in reporting or changes in the frame (i.e., the addition of new-school districts or schools, or the deletion of schools from the frame), or both.

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