释义 |
arithmetic mean arithmetic mean(arithmetic average) An average obtained by adding together the individual numbers concerned and dividing the total by their number. For example, the arithmetic mean of 7, 20, 107, and 350 is 484/4 = 121. This value, however, gives no idea of the spread of numbers and may prove misleading where there are a small number of extreme values. Comparegeometric mean; median; weighted average. See alsonormal distribution. |