Begin your search in Data by Subject.
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This LibGuide lists and describes many sources and resources for data.
Information on this website comes in the form of electronic files that can or must be analyzed using a statistical software package such as SPSS.
Be aware that websites listed on this guide are only a small fraction of what is available. Consider them a starting point in your search for data.
Image source: W. Rebel. Binary data. GNU Free. Wikimedia Commons.