I think this is what you are looking for
here are some references :


VACETS Technical Column - tc59
... total set of potential measurements is referred to as ... a measure of a central position
of a data set ... of dispersion in statistics. The standard deviation ...
www.vacets.org/tc/tc59.html

ADMINISTRATION OF JUSTICE ADULT EDUCATION ANTHROPOLOGY ART ...
Formato de arquivo: PDF/Adobe Acrobat - ver em HTML
... STATISTICS Prerequisite: MATH 099 or equivalent. Collection and presentation of
business data; empirical frequency distributions; measures of central position ...
www.oc.ctc.edu/view/FALCourseDescviewupdate.PDF

Business and Economics Program Descriptions - Olympic College
... empiracle frequency distributions; measures of central position; measures of dispersion;
index numbers; probability concepts. BS-EC 258 -- BUSINESS STATISTICS. ...
www.oc.ctc.edu/instruction/bt/b_t_webpages/bsecprogdesc.htm...


good luck !