This data set shows the weights of several students' backpacks in pounds. 9, 7, 6, 3, 9 find the mean, range, and mean absolute deviation of this data set. round to the nearest tenth. first answer gets brainliest! mean: range: mean absolute deviation:

Mean is the average of the data set, and can be found by adding all numbers then dividing by the amount of numbers.

9+7+6+3+9
34÷5
6.8
Mean = 6.8

Range is found by subtracting the lowest number from the highest number.

9-3=6
Range = 6

Calculating the mean absolute value requires a few extra steps. 

-Find the mean: 6.8 
-Subtract every value and the mean (always use absolute value since values must be positive):
9-6.8=2.2
7-6.8=0.2
6-6.8=-0.8 → 0.8
3-6.8=-3.8 → 3.8
9-6.8=2.2
-Find the mean of these values:
2.2+0.2+0.8+3.8+2.2
9.2÷5
1.84 
Mean absolute value (rounded to the nearest tenth: 1.8