Mean: 151
MAD: 9.1
To find the mean[average] we have to add all the numbers together, than divide by the amount of number in the data set.
To find the MAD [mean absolute deviation] we have to:
1 - Find the mean of the data
Mean: 151
2 - Subtract the mean from each number in the data set, and find the absolute value.
135 - 151 = |16| = 16
160 - 151 = |9| = 9
145 - 151 = |-6| = 6
155 - 151 = |4| = 4
170 - 151 = |19| = 19
150 - 151 = |-1| = 1
142 - 151 = |-9| = 9
Step 3 - Find the mean of the new data set.
MAD: 9.1