The median is 8.
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median of {5, 15, 9, 13} is 11 To find the median of a dataset sort the data into order and the median is the middle one; if there are an even number of items in the dataset, then the median is the mean average of the middle two. {5, 15, 9, 13} → {5, 9, 13, 15} There are 4 data items, → median is mean of {9, 13} = (9 + 13) / 2 = 11.
The middle two numbers are 8 and 10 so the median is 9.
The median of 5, 10, 13, 7, and 5 is 7.
9
The median of 2 3 5 7 11 is 5, the central number.