What is the mad of the following numbers? 2, 3, 5, 7, 8, 8, 9

The MAD is 2.2857142857143, so about 2

To find the MAD, you have to find the mean, or average, of the numbers first.
2+3+5+7+8+8+9=42
42/7=6

Then, you have to find the difference between the average and each data value (in absolute value)
6-2=4
6-3=3
6-5=1
7-6=1
8-6=2
8-6=2
9-6=3

Then, you add up all the differences.
4+3+1+1+2+2+3=16

And then find the mean of that number.
16/7=2 2/7
Or in decimals, this is about 2.285714