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Author Nelson, Lloyd S.
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Language English
Subject Keyword Mean ♦ Standard deviation
Abstract A procedure for sequentially recomputing the mean and standard deviation of a weighted series of numbers as new values are added is given by Hanson [2]. To accommodate the most frequently occurring situation, Cotton [1] expressed Hanson's formulas in terms of unit weights. The result is accurate for updating the mean. However, for updating the standard deviation, Cotton chose to use Hanson's eq. (14), which Hanson rejected as being inaccurate when the new value is close to the mean.
Description Affiliation: General Electric Company, Louisville, KY (Nelson, Lloyd S.)
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-08-01
Publisher Place New York
Journal Communications of the ACM (CACM)
Volume Number 22
Issue Number 8


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Source: ACM Digital Library