1. Mean Absolute Deviation
Mean & Median are “centers” of data.
Mean Absolute Deviation or MAD measures the difference of variance between numbers in a data set.
Comparing the “centers” to MAD offers more information about the data.
Sampling means surveying a part of a group. Multiple samples makes data more accurate.

2. 55,95,154,196,250
55 95,154,196,250 55
150 95 95
150 55
154
150 4
196
150 46
250
150
100
300
300/5 60

3. 132,153,155,161,169
132
154 22
153
154 1
155
154 1
161
154 7
169
154 15 46
46/5
9.2

4. Mean = 150
Mean = 154
mad = 60
mad = 9.2
Interpreting this data: While the means are
close, the MAD number suggests that the
Thompson family has a higher occurrence of
outliers.

7. Practice finding the mad
Your turn!
Practice finding the mad
#1-7
Formative grade!