Scatterplots and Mean Absolute Deviation

Find the Mean Absolute Deviation: (MAD)

10, 9, 3, 8, 10.

• 3

• 5

• 1

• 2

Which best describes the form of this scatterplot?

• linear

• nonlinear

• scattered

What type of association does this graph have?

• positive

• negative

• none

• all of the above

The scatterplot shows the number of people in each of 8 different households and the average amount of money each household spent on groceries. Based on the scatterplot, what is the best prediction of the average amount of money spent on groceries for a household that has 7 people?

• $240

• $190

• $210

• $300

The scatterplot shows the average number of hours each of 13 people spends at work every week and the average number of hours each of them spends on recreational activities every week. Based on the scatterplot, what is the best prediction of the average number of hours a person spends at work every week if that person spends an average of 10 hours on recreational activities each week?

• 33 h

• 85 h

• 50 h

• 65 h

Calculate the Mean Absolute Deviation 7, 9, 2, 7, 3, 5, 10

• 2.41

• 2

• 4.21

• 3

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

• 9

• 6

• 1.2

• 5

Find the MAD for the following set: 85, 90, 68, 75, 79

• 79.4

• 6.48

• 32.4

• 79

What is the second step in calculating Mean Absolute Deviation

• Find the average/mean

• Subtract each number from the mean

• Calculate the median

• None of the above

Which of the following is the mean absolute deviation for the set of data?
2.50 3.75 1.25 2.25 3.00

• 3.3

• 0.66

• 2.50

• 2.55