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Overview

Like the DAS Online, the DAS for Windows allows you to produce tables and correlation matrices from NCES data sets, mainly postsecondary data. There are 2 datasets in the DAS for Windows format. They are:

To create tables or correlations, you will need to the following:

  1. Download and Install the DAS on your computer
  2. Launch the DAS
  3. Create a programming instruction file for a table or correlation matrix
  4. Run your file
  5. View the output file

Each DAS for Windows runs in two modes—Tables and Correlations. For instructions on using each mode, see User Guide: Systems Information–Starting the DAS.

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.

In the Correlations mode, the DAS will produce a correlation matrix that can be used for linear regression models. The design effects (DEFTs) for each variable are included in the output. Since statistical procedures generally compute regression coefficients based on a simple random sample assumptions, the standard errors must be adjusted with the design effect to take into account the stratified sampling method used in NCES surveys.

It is helpful to have a basic knowledge of SPSS or SAS and a general understanding of multiple regressions before you use the correlations mode. For information about SPSS or SAS, visit www.spss.com or www.sas.com.

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