a statistical unit used in educational testing. Test scores are normalized (mathematically transformed) so that they have a mean ("average") of 5 and a standard deviation of 2. This tranformation naturally divides the ranked scores into 9 classes called stanines 1-9. The percentage of scores in each stanine is 4, 7, 12, 17, 20, 17, 12, 7, and 4, respectively. The technique originated in the U.S. military during World War II, and the word is a contraction of "standard of nine."

Dictionary of units of measurement. 2015.

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  • Stanine — (STAndard NINE) is a method of scaling test scores on a nine point standard scale with a mean of five (5) and a standard deviation of two (2).Some web sources attribute stanines to the U.S. Army Air Forces during World War II. The earliest known… …   Wikipedia

  • stanine — [stā′nīn΄] n. 〚sta(ndard) + nine〛 any of nine statistical units based on a standardized distribution of results, used in grading psychological or educational tests * * * …   Universalium

  • stanine — nine point scale for test scores, introduced by the U.S. Air Force in 1942, from sta(ndard) + nine …   Etymology dictionary

  • stanine — [stā′nīn΄] n. [sta(ndard) + nine] any of nine statistical units based on a standardized distribution of results, used in grading psychological or educational tests …   English World dictionary

  • stanine — noun Etymology: standard (score) + nine Date: 1944 any of the nine classes into which a set of normalized standard scores arranged according to rank in educational testing are divided, which include the bottom 4 percent and the top 4 percent of… …   New Collegiate Dictionary

  • stanine — sta·nine …   English syllables

  • stanine — ˈstāˌnīn noun ( s) Etymology: standard (score) + nine 1. : an aptitude score for aviation students ranging from 1 to 9 based on a battery of tests and weighted for ratings of pilot, bombardier, and …   Useful english dictionary

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