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Data Analysis System (DAS)

The Data Analysis System (DAS) is a software application that provides public access to NCES survey data. The DAS allows users to produce tables and correlation matrices from NCES data sets. There is a separate DAS for each data set, but all have a consistent interface and command structure. Each DAS runs in two modes—Tables and Correlations—and is available both in a Windows- and web-based format.

DAS Online is the web-based version of the DAS. Users can create programming instruction files, run tables, and view output using a web browser. They can also import a Table Parameter File (TPF) or Correlations Parameter File (CPF), modify it, and run the new file online. In the Tables mode, the DAS will create a table of estimates, corresponding standard errors that are calculated by taking into account the complex sampling designs used in NCES surveys, and weighted sample sizes for the estimates.

If you have never used the DAS, we strongly encourage you to read the DAS User Guide to help you get started.