arithmetic mean

/EH0 R IH0 TH M EH1 T IH0 K M IY1 N/
noun
  1. 1

    The measure of central tendency of a set of values computed by dividing the sum of the values by their number; commonly called the mean or the average.

    The arithmetic mean of 3, 6, 2, 3 and 6 is (3 + 6 + 2 + 3 + 6) / 5 = 4.

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Source: https://en.wiktionary.org/wiki/arithmetic%20mean