Selecting the Samples for the National 2001 Geography Assessment
The national samples for the 2001 geography assessment were selected using a complex multistage sampling design that involved sampling students from selected schools within selected geographic areas across the country. The sample design had the following stages:
- selection of geographic areas (a county, group of counties, or metropolitan statistical area);
- selection of schools (public and nonpublic) within the selected areas; and
- random selection of students within the selected schools.
Each selected school that participated in the assessment and each student assessed represents a
portion of the population of interest. Therefore, sampling weights are needed to make valid inferences between the student samples and the respective populations from which they were drawn. Sampling weights adjust for disproportionate representation due to such oversampling.
Below is a summary of the national school and student participation rates for the NAEP 2001 geography assessment.
|
Weighted school participation |
![](https://webarchive.library.unt.edu/eot2008/20090508031058im_/http://nces.ed.gov/nationsreportcard/images/common/transparent.gif) |
Samples where accommodations were not permitted |
![](https://webarchive.library.unt.edu/eot2008/20090508031058im_/http://nces.ed.gov/nationsreportcard/images/common/transparent.gif) |
Samples where accommodations
were permitted |
|
Student participation |
Overall participation rate |
Student participation |
Overall participation rate |
|
![](https://webarchive.library.unt.edu/eot2008/20090508031058im_/http://nces.ed.gov/nationsreportcard/images/common/transparent.gif) |
![](https://webarchive.library.unt.edu/eot2008/20090508031058im_/http://nces.ed.gov/nationsreportcard/images/common/transparent.gif) |
![](https://webarchive.library.unt.edu/eot2008/20090508031058im_/http://nces.ed.gov/nationsreportcard/images/common/transparent.gif) |
![](https://webarchive.library.unt.edu/eot2008/20090508031058im_/http://nces.ed.gov/nationsreportcard/images/common/transparent.gif) |
Percentage before
substitution |
Percentage after substitution |
Total number of schools |
Weighted percentage student participation |
Total number of students assessed |
Before substitution |
After substitution |
Weighted percentage student participation |
Total number of students assessed |
Before substitution |
After substitution |
Grade 4 |
|
|
|
|
|
|
|
|
|
|
|
Public |
83 |
88 |
276 |
95 |
5,895 |
79 |
84 |
95 |
6,181 |
79 |
84 |
Nonpublic |
83 |
91 |
89 |
96 |
1,031 |
80 |
87 |
96 |
1,038 |
80 |
88 |
Combined |
83 |
88 |
365 |
95 |
6,926 |
79 |
84 |
95 |
7,219 |
79 |
84 |
|
Grade 8 |
|
|
|
|
|
|
|
|
|
|
|
Public |
79 |
87 |
259 |
92 |
7,728 |
73 |
80 |
92 |
8,063 |
72 |
80 |
Nonpublic |
84 |
88 |
110 |
96 |
1,232 |
81 |
84 |
96 |
1,245 |
80 |
84 |
Combined |
79 |
87 |
369 |
93 |
8,960 |
74 |
81 |
92 |
9,308 |
73 |
80 |
|
Grade 12 |
|
|
|
|
|
|
|
|
|
|
|
Public |
73 |
80 |
311 |
76 |
7,977 |
55 |
61 |
76 |
8,112 |
55 |
61 |
Nonpublic |
67 |
77 |
63 |
98 |
1,022 |
66 |
76 |
91 |
1,021 |
61 |
70 |
Combined |
72 |
80 |
374 |
77 |
8,999 |
56 |
62 |
77 |
9,133 |
56 |
62 |
![](https://webarchive.library.unt.edu/eot2008/20090508031058im_/http://nces.ed.gov/nationsreportcard/images/common/transparent.gif) |
|
Last updated 3 June 2002 (DSS)
|