Your description of the median is correct except for one minor, but very important, point. The list must be **ordered** in order to compute the median.

You were given 15,11,12,3,14,17 as your data set. Ordering from least to greatest we get 3,11,12,14,15,17. Now since there is an even number of data the median is the arithmetic mean of the 3rd and 4th numbers: (12+14)/2=13.

The median would be 13.

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Most technology will order a set of numbers for you (for example Excel or a graphing utility.) Ordering your data set is a good first step: it allows you to find the range (difference between the least and greatest), compute the median,and group the numbers (for instance in a grouped frequency distribution or displayed in a stemplot, etc...)

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