Sheppard's correction
[ shep-erdz ]
/ ˈʃɛp ərdz /
noun Statistics.
a method of correcting the bias in standard deviations and higher moments of distributions that arises from grouping values of the variable.
Also called
Sheppard's adjustment.
Origin of Sheppard's correction
named after William F.
Sheppard (1863–1936), English statistician