Percentiles and Percentile Ranks

  • Albert K. Kurtz
  • Samuel T. Mayo


A percentile is a point below which a given percentage of the cases occur. For instance, 67 percent of the cases are below the sixty-seventh percentile, which is written as P 67. The middle of a distribution, or the point below which 50 percent of the cases lie, is, of course, the fiftieth percentile. In Chapter 2 we learned another name for this value—the median. The median is probably computed, used, and discussed more than any other percentile.


Frequency Distribution Cumulative Frequency Percentile Rank Percentile Range Quartile Deviation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Kelley, Truman L. Statistical method. New York: Macmillan, 1924.MATHGoogle Scholar

Copyright information

© Springer-Verlag New York Inc. 1979

Authors and Affiliations

  • Albert K. Kurtz
    • 1
  • Samuel T. Mayo
    • 2
  1. 1.Winter ParkUSA
  2. 2.Foundations of Education, School of EducationLoyola University of ChicagoChicagoUSA

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