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List of TablesTable D-23. Number and percentage of states that used stratified random sampling, by categories (strata) used: School year 2004-05
| Categories (strata) | Percent of | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of states | All states [N=51] | States that used stratified random sampling [n=38] | ||||||||||
| Did not use stratified random sampling1 | 13 | 25 | ‡ | |||||||||
| Disability category | 35 | 69 | 92 | |||||||||
| Age or grade level | 38 | 75 | 100 | |||||||||
| Race or ethnicity | 18 | 35 | 47 | |||||||||
| Educational environment | 28 | 55 | 74 | |||||||||
| Date of identification | 9 | 18 | 24 | |||||||||
| Transfers | 10 | 20 | 26 | |||||||||
| Triennials | 10 | 20 | 26 | |||||||||
| English language learners | 9 | 18 | 24 | |||||||||
| Other category (strata) used | 6 | 12 | 16 | |||||||||
|
‡ Not applicable. 1 In addition to other types of sampling, this includes child records not reviewed and nonresponse. NOTE: States could select more than one category, therefore, the Percent columns will not sum to 100. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Special Education Research, Evaluation of States' Monitoring and Improvement Practices Under the Individuals with Disabilities Education Act, Part B Monitoring Evaluation Questionnaire. |
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