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Sheppard's correction

American  
[shep-erdz] / ˈʃɛp ərdz /

noun

Statistics.
  1. a method of correcting the bias in standard deviations and higher moments of distributions that arises from grouping values of the variable.


Etymology

Origin of Sheppard's correction

Named after William F. Sheppard (1863–1936), English statistician