9. The mean (median) is the median of all the data in the center of the back.
The sorting ascending descending it.
For example, What is the median of 3, 7, 19, 25, 12, 18, 10.
How to sort data in ascending, 3, 7, 10, 12, 18, 19, 25.
contains all 7 items sorted, then the numbers. the middle number is the number for the 4 for a median of 4 is 12.
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