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Analyze & Subset--Study No. 4684

Title: National Election Pool General Election Exit Polls, 2006

Online Analysis Using SDA

The online analysis system allows you to run both simple and complex analyses, recode and compute new variables, and subset variables or cases for downloading. The software powering the system, named Survey Documentation and Analysis (SDA), was developed by the Computer-assisted Survey Methods Program (CSM) at the University of California, Berkeley.

Click on the link(s) below to begin using SDA.


Please note that weights may affect analysis results.

The data contain a weight variable (WGT) that should be applied in all analyses. Unweighted tabulations will be seriously misleading and should not be used. The exit poll results are weighted to reflect the complexity of the sampling design and take into account the different probabilities of selecting a precinct and of selecting a voter within each precinct. For example, minority precincts that were selected at a higher rate received a smaller weight than other precincts of the same size. An adjustment was made for voters who were missed or refused to be interviewed, which was based on their observed age, race, and sex. Respondents were also weighted based upon the size and distribution of the final tabulated vote within geographic regions of the state or the nation. The telephone survey results were weighted before being combined with the exit poll data to reflect the probabilities of selection and to reflect demographic characteristics in that state. The demographic weighting was based on all respondents 18 years of age or older selected in the sample regardless of whether they voted absentee/early or not.

If you're having trouble with SDA utilities, you may wish to consult the online help files for SDA users provided by the Computer-assisted Survey Methods Program (CSM) at the University of California, Berkeley.