ARITHMETIC MEAN
\ɐɹˈɪθmətˌɪk mˈiːn], \ɐɹˈɪθmətˌɪk mˈiːn], \ɐ_ɹ_ˈɪ_θ_m_ə_t_ˌɪ_k m_ˈiː_n]\
Definitions of ARITHMETIC MEAN
 2006  WordNet 3.0
 2011  English Dictionary Database
 1985  The Free Online Dictionary of Computing
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By Princeton University
By DataStellar Co., Ltd

The mean of a list of N numbers calculated bydividing their sum by N. The arithmetic mean is appropriatefor sets of numbers that are added together or that form anarithmetic series. If all the numbers in the list werechanged to their arithmetic mean then their total would staythe same.For sets of numbers that are multiplied together, thegeometric mean is more appropriate.
By Denis Howe