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A guide to data sources in many different fields.

This guide is a work in progress. As such it will be updated. Let a reference librarian know if you need help locating data.

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- administrative data
- Administrative data is data collected from official records.
- aggregate data
- Aggregate data is data that is representitive of a number of individual samples, usually produced by a statistical or mathematical proceedure (e.g. frequency counts).
- census
- A census is a survey that contacts every single entity (e.g. people or organizations) in the population.
- cross-sectional
- Cross-sectional data is data gathered at a single point in time.
- data
- Data is raw input for statistical analysis.
- Federal Information Processing Series (FIPS) codes
- Federal Information Processing Series (FIPS) codes are standardized numeric or alphabetic codes used to ensure uniform identification of geographic entities through all United States government agencies.
**Now superceded by ANSI codes.** - longitudinal data
- Longitudinal data follows the same individuals for an extended period of time (e.g. months, years, or decades; typically a year or more).
- microdata
- Microdata is raw observations, (e.g. survey responses), and is thus data rather than statistics.
- North American Industry Classification System (NAICS) codes
- North American Industry Classifrcation System (NAICS) codes are used by the governments of the United States, Canada, and Mexico to identify industries for statistical purposes.
- observation
- see sample.
- panel data
- see longitudinal data.
- population
- The population is the set all possible observations or samples.
- statistics
- Statistics are the results of a statistical analysis.
- statistical analysis
- Statistical analysis is the process or product of performing an analysis using techniques from the field of statistics.
- survey
- Surveys are methods of gathering data from a sample of the population.
- sample
- A sample is a small subset of the population.
- unit of analysis
- Unit of analysis is the type or level of phenomenon that the researcher is looking to study.
- unit of observation
- Unit of observation is the type or level of phenomenon about which the data was gathered.
- universe
- see population.