1. Mean Absolute Deviation

2. Definitions
Mean: average of data
Absolute Value: distance a number is from zero on a number line
Deviation: measure of variability that shows how far a number is from the overall pattern of data

3. Steps to find MAD Step 1: Find the mean of the data.
Step 2: Find the difference of each number from the mean.
Step 3: Add the differences and divide by the number of data (MAD)

4. Finding the Mean Review
Directions: Find the mean of the data below: 5, 7, 1, 2, 8, 10, 1, 7, 1, 2 Step One: Add the numbers together = ? = 44 Step Two: Count how many numbers there are in the data: There are 10 numbers in the data. Step Three: Divide the sum of the data by the number of the data: 44 / 10 = ? 44 / 10 = 4.4

5. You Try!!!
Find the mean of the data below: 10, 20, 20, 20, 10, 40, 50, 70

6. Finding Mean Absolute Deviation

7. Finding Mean Absolute Deviation

8. Finding Mean Absolute Deviation

9. Finding Mean Absolute Deviation
Directions: Find the mean absolute deviation of the data below: 8, 10, 14, 11, 11, 15, 10, 9 *This time…the mean is not given to you! You need to find it first!!! Step One: The mean is 11. There are 8 numbers in the data set.

10. Finding Mean Absolute Deviation

11. Finding Mean Absolute Deviation