What is the median of the data set?

9 3 10 12 4 5 12 2

First you put the numbers in order from least to greatest.

2,3,4,5,9,10,12,12

The median is the very middle number. Since the median is between 5 and 9, you find the mean of 5 and 9. 5+9=14 14/2=7. The median is 7

The key is to cross 1 number from both sides till you get to the middle last number so the answer is 4