Mean Absolute Deviation, Standard Deviation, Variance

Determine the mean absolute deviation of the data.
9, 7, 11, 10, 8

• 9
• 6
• 1.2
• 5

What is the first step when calculating the Mean Absolute Deviation?

• Find the distance each value is from the mean
• Find the mean of the distances
• Find the mean of the data

What is the second step when calculating the Mean Absolute Deviation?

• Find the distance each value is from the mean
• Find the mean of the distances
• Find the mean of the data

What is the third step when calculating the Mean Absolute Deviation?

• Find the distance each value is from the mean
• Find the mean of the distances
• Find the mean of the data

Find the Mean Absolute Deviation: (MAD)

10, 9, 3, 8, 10.

• 3

• 5

• 1

• 2

What is the average distance form the mean of the numbers:
 10, 8, 5, 12, 20

• 3.4
• 4
• 11
• 5

Which M.A.D. would show the most variability?

• .5
• 1
• 1.5
• 2

Which M.A.D. would show the most consistency?

• .5
• 1
• 1.5
• 2

Find the Mean Absolute Deviation:  
5, 11, 2, 7, 16. 

• 3.2
• 2.8
• 1.2
• 4.2

Which dot plot shows more consistency?

• a
• b