Wednesday, June 13, 2012

Median


    The median is the middle value, so I'll have to rewrite the list in order:


    13, 13, 13, 13, 14, 14, 16, 18, 21

      There are nine numbers in the list, so the middle one will be the (9 + 1) ÷ 2 = 10 ÷ 2 = 5th number:
        13, 13, 13, 13, 14, 14, 16, 18, 21
      So the median is 14.

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