Mean: 8+8+9+9+7+9+6=56 Then, you divide by the number of numbers. 56/7=8
Median: First, put them in order from least to greatest. 6,7,8,8,8,9,9. Find the middle of all of them. It would be 8.
Range: 9-6=3.
M.A.D (Mean Absolute Deviation):
You use the mean and find the difference between the mean and the numbers you were given. After that, get the absolute value of them. |x-#|
So, 8-6, 8-7, 8-8, 8-8, 8-8, 8-9, 8-9
2. 1. 0. 0. 0. 1(a.v) 1.(a.v)
Finally, find the mean of the differences. 2+1+0+0+0+1+1=5. 5/8. (0.682)