Mean Absolute Deviation and Bivariate Data

The (a)   of a data set is the average distance between each data value and the mean.

Data with two variables or pairs of numerical observations is (a)   .

Find the Mean Absolute Deviation:  5, 11, 2, 7, 16.  The Mean is 8.2 

• 3.2

• 2.8

• 1.2

• 4.2

Find the MAD of the following data sets: $29, $58, $15, $129, $75, $22

• 196

• 54.7

• 114

• 32.67

Find the MAD for the following set: 65, 90, 85, 70, 70, 95, 55

• 12.24

• 75.7

• 85.7

• 40

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

• 9

• 6

• 1.2

• 5

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

• 3

• 5

• 1

• 2

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

In calculating MAD, after you find the absolute deviations you must _____________.

• Do nothing because you are done.

• Subtract them from the mean.

• Find the mean of the absolute deviations.

In calculating MAD, after you find the average or mean you must _____________. 

• do nothing because you're done

• Find out the distance each number is from the mean.

• Find the distance each number is from zero.