This Glossary of Common Data Terms was developed locally as a non-technical resource for those interested in expanding their functional data vocabulary. This glossary contains commonly used data terms defined in easy-to-understand language. Although the definitions are informal and non-academic, the following academic texts heavily informed their development:

Shryock, H.S., and Siegel, J.S. The Methods and Materials of Demography. San Diego, CA: Academic Press, 1976.
Haupt, A. and Kane, T.T. Population Handbook. Washington, DC: Population Reference Bureau, Inc., 1978.

Click here for a printable version of the Glossary of Common Data Terms.

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There is currently 1 name in this directory beginning with the letter Y.
Years of potential life lost (YPLL75) rate
measure of premature death for a population. YPLL75 is the sum of all the years of life “lost” by individuals in that population who died before age 75. A person who died at age 60 would contribute 15 years to the population’s YPLL, a person who died at age 48 would contribute 27 years, and a person who died at 75 or older would contribute zero. The YPLL75 is often reported as a rate. See Rate.




Below are a few of the many free resources available online for those who would like to learn more about data, from the basics to advanced concepts and skills.

  1. School of Data.
  2. Data-Pop Alliance.
  3. Oceans of Data Institute.