Calculate Mean and Absolute Deviation

Before you can begin calculating the variance, you must first:

• find the mean

• find the median

• find the mode

• find the range

If you add up all the values in a data set and then divide by the number of values, you have calculated the ____ of the data set.

• mean

• median

• mode

• range

Find the Mean Absolute Deviation: 79, 78, 74, 77, 77

• 77

• 1.3

• 1

• 1.2

Find the Mean Absolute Deviation: 22, 24, 29, 22, 23, 24 (Round to the nearest tenth)

• 1.7

• 24

• 1

• 1.5

Find the Mean Absolute Deviation: 100, 104, 107, 105

• 1

• 1.5

• 2

• 104

An amusement park recorded the ages of the first ten people to ride a new attraction. The ages were as follows: 11, 34, 16, 18, 22, 30, 18, 20, 15, and 16. What is the mean absolute deviation of this data set?

• 20

• 5.2

• 18

• 4.8

Find the MAD: 6, 13, 27, 29, 14, 19

• 19

• 18

• 7

• 6.8

Find the MAD: 79, 78, 74, 77, 77

• 1.2

• 1.3

• 77

• 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 MAD:
410,420,440,480,500

• 32

• 50

• 450

• 430