Arrange data from small to large or from large to small. If the number of data is odd, the number in the middle is the median of this set of data.
For example, 1) arranges data in sequence, for example, 1, 1, 2, 2, 3, 7, 9,
2) Take the middle number, in this case, 2, (odd numbers take the middle number) is the sought median,
If the number of data is even, the average of the middle two data is the median of this set of data.
Such as: 1) arrange data in sequence, such as 0, 1, 1, 2, 2, 3, 7, 9,
2) Take the middle number, which is 2 in this example, (even numbers take the average of the middle two digits) which is the median.