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PEDAR: Research Methodology Gender Differences in Participation and Completion of Undergraduate Education and How They Have Changed Over Time
Integrated Postsecondary Education Data System
The Current Population Survey
National Postsecondary Student Aid Study
High School and Beyond Longitudinal Study
National Educational Longitudinal Study
Beginning Postsecondary Students Longitudinal Study
1989-90 Beginning Postsecondary Students Longitudinal Study
1995-96 Beginning Postsecondary Students Longitudinal Study
Baccalaureate and Beyond Longitudinal Study
1993/97 Baccalaureate and Beyond Longitudinal Study
2000/01 Baccalaureate and Beyond Longitudinal Study
Accuracy of Estimates
Item Response Rates
Data Analysis System
Statistical Procedures
Differences Between Means
Executive Summary
References
Full Report (PDF)
Executive Summary (PDF)
 Data Analysis System

The estimates presented in this report were produced using the Data Analysis System (DAS) for each of the surveys analyzed. The DAS software makes it possible for users to specify and generate their own tables. The DAS is publicly available and designed to protect the confidentiality of individuals. With the DAS, users can replicate or expand upon the tables presented in this report. In addition to the table estimates, the DAS calculates proper standard errors15 and weighted sample sizes for these estimates. If the number of valid cases is too small to produce a reliable estimate (fewer than 30 cases), the DAS prints the message "low-N" instead of the estimate. All standard errors for estimates presented in this report can be viewed at http://nces.ed.gov/das/library/reports.asp.

In addition to tables, the DAS will also produce a correlation matrix of selected variables to be used for linear regression models. Included in the output with the correlation matrix are the design effects (DEFTs) for each variable in the matrix. Since statistical procedures generally compute regression coefficients based on simple random sample assumptions, the standard errors must be adjusted with the design effects to take into account the stratified sampling method used in the surveys.

For more information about the Data Analysis Systems, consult the NCES DAS web site (http://nces.ed.gov/das) or contact:

Aurora D'Amico
Postsecondary Studies Division
National Center for Education Statistics
1990 K Street, NW
Washington, DC 20006-5652
(202) 502-7334
aurora.d'amico@ed.gov

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National Center for Education Statistics - http://nces.ed.gov
U.S. Department of Education