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NAEP Assessment Sample Design → NAEP 2006 Sample Design → Selection of Primary Sampling Units (PSUs) for the 2006 Assessment → Primary Sampling Unit (PSU) Generation: Certainty PSUs for the 2006 Assessment

Primary Sampling Unit (PSU) Generation: Certainty PSUs for the 2006 Assessment

Any primary sampling unit (PSU) was defined as a certainty PSU if it had 500,000 or more youths. The estimated number of youths is the number of persons age 17 or under from the 2003 U.S. Census Bureau's Population Estimates Program.1 These PSUs were so large that a sample of schools was taken from all of them (rather than from only some of them). There were two exceptions to the 500,000 cutoff. The Honolulu, Hawaii and Washington, D.C. PSUs were included as certainties by design. A total of 29 PSUs were classified as certainties in the 2006 frame. The table below provides a listing of the certainty PSUs.

Metropolitan Statistical Area (MSA) definition for certainty PSUs, by primary sampling unit (PSU): 2006
PSU Metropolitan Statistical Area (MSA) State Number of
counties
Number of youths
Grand total 203 29,969,805
Total Northeast 40 6,907,180
1–1 Boston-Cambridge-Quincy MA 5 929,867
1–2 New York-Northern New Jersey-Long Island NJ-PA 13 1,579,191
1–3 New York-Northern New Jersey-Long Island NY 10 2,933,093
1–4 Pittsburgh PA 7 517,631
1–5 Philadelphia-Camden-Wilmington PA 5 947,398
Total Midwest 40 5,232,306
2–1 Chicago-Naperville-Joliet IL 9 2,249,472
2–2 Detroit-Warren-Livonia MI 6 1,163,068
2–3 Minneapolis-St. Paul-Bloomington MN 11 765,318
2–4 St. Louis MO-Il MO 9 526,692
2–5 Cleveland-Elyria-Mentor OH OH 5 527,756
Total South 93 8,534,382
3–1 Washington-Arlington-Alexandria DC 1 108,403
3–2 Tampa-St. Petersburg-Clearwater FL 4 569,333
3–3 Miami-Fort Lauderdale-Miami Beach FL 3 1,262,212
3–4 Atlanta-Sandy Springs-Marietta GA 28 1,232,732
3–5 Washington-Arlington-Alexandria MD 5 568,800
3–6 Baltimore-Towson MD 7 646,729
3–7 San Antonio TX 8 511,008
3–8 Houston-Sugar Land-Baytown TX 10 1,462,521
3–9 Dallas-Fort Worth-Arlington TX 12 1,582,935
3–10 Washington-Arlington-Alexandria VA 15 589,709
Total West 30 9,295,937
4–1 Phoenix-Mesa-Scottsdale AZ 2 997,240
4–2 Sacramento-Arden-Arcade-Roseville CA 4 510,956
4–3 San Diego-Carlsbad-San Marcos CA 1 748,944
4–4 San Francisco-Oakland-Fremont CA 5 935,424
4–5 Riverside-San Bernardino-Ontario CA 2 1,081,259
4–6 Los Angeles-Long Beach-Santa Ana CA 2 3,477,216
4–7 Denver-Aurora CO 10 594,262
4–8 Honolulu HI 1 208,191
4–9 Seattle-Tacoma-Bellevue WA 3 742,445
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2006.

1 The U.S. Census Bureau's Population Estimates Program (www.Census.gov/popest/estimates.html) yearly publishes total resident population estimates by demographics such as age, sex, race, and Hispanic origin for the nation, states, and counties.


Last updated 13 April 2010 (GF)

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