Sample design efficiency study : optimal two-stage sample design. - National Center for Education Statistics; Research Triangle Institute (Washington : Dept. of Health, Education, and Welfare, Education Division, National Center for Education Statistics : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977)
Prepared by Research Triangle Institute under contract no. OEC-0-73-6666.
At head of title: National longitudinal study of the high school class of 1972.
Bibliography: p. 23.
Mode of access: Internet.
Keywords: High school graduates -- United States -- Statistics; Sampling (Statistics); Educational surveys