Mean, Median, Mean Absolute Deviation

Mean Absolute Deviation

Review: 10,9,3,8,10

• Find the mean, median, mode, range of the data.

Mean Absolute Deviation

• The average distance between the data values and the mean.

• Find the mean, then find the distance between the mean and each data value.

Multiple Choice

What is Mean Absolute Deviation?

• The mean of the data

• The absolute value of the mean

• The variation of data values around the mode

• The average distance between the data values and the mean

Example: 10,12,18,11,19

• 10+12+18+11+19=70 70/5=14

• 14-10=4

• 14-12=2

• 18-14=4

• 14-11=3

• 19-14=5

• 4+2+4+3+5=18. 18/5=3.6

Multiple Choice

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

• 9
• 6
• 1.2
• 5

Multiple Choice

Find the Mean Absolute Deviation:  10, 9, 3, 8, 10.  The Mean is 8

• 3
• 5
• 1
• 2

Multiple Choice

Find the MAD:
58, 38, 54, 48, 26, 36

• 43
• 20
• 10
• 12