National longitudinal study of the high school class of 1972 : sample design efficiency study : effects of stratification, clustering, and unequal weighting on the variances of NLS statistics /
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| Other Authors: | , |
| Format: | Government Document Book |
| Language: | English |
| Series: | Sponsored reports series.
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| Item Description: | Prepared under contract number OEC-0-73-6666 with HEW for the National Center for Education Statistics. |
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| Physical Description: | v, 22 pages ; 26 cm. |
| Bibliography: | Bibliography: page 22. |