Mid Rank

Mid rank - If x1,x2,..xn are "˜n' observations in a data set with frequencies f1,f2,...fn respectively. Lety1,y2,...,yn be the observed data arranged in the ascending order with respective ordered frequencies g(1),g(2),...g(n). Then mid-rank for yi is then calculated by

Ri=g(1)+g(2)+...+g(i-1)+(g(i)+1)/2;where i=1,2,...,n

[Category=Data Quality ]

Source: iSixSigma, 04 February 2011 08:26:11, https:web.archive.org/web/20111109014246/http:www.isixsigma.com/index.php?option=com_glossary