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mean mode help please

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how to find mean,median

Oct 17th, 2017

The "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers.

 The "median" is the "middle" value in the list of numbers. 

To find the median, your numbers have to be listed in numerical order, so you may have to rewrite your list first. The "mode" is the value that occurs most often. If no number is repeated, then there is no mode for the list.

  • Find the mean, median, mode, and range for the following list of values:
    • 13, 18, 13, 14, 13, 16, 14, 21, 13

    The mean is the usual average, so:

      (13 + 18 + 13 + 14 + 13 + 16 + 14 + 21 + 13) ÷ 9 = 15

    Note that the mean isn't a value from the original list. This is a common result. You should not assume that your mean will be one of your original numbers.

    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

Feb 4th, 2015

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