What is the MAD of the following numbers?

2, 3, 5, 7, 8, 8, 9

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

The MAD is 2.2857142857143, so about 2