The median is the middle value.
To work out the median:
Put the numbers in order:
3 6 6 6 7 9 11 11 13
The number in the middle of the list is the median.
So the median value is 7.
If there are two middle values, the median is halfway between them. Work out the median for this set of numbers:
3 6 6 6 7 8 9 11 11 13
There are two middle values, 7 and 8.
The median is halfway between 7 and 8, so the median is 7.5.
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