Quiz: Mean Absolute Deviation (MAD)

What is Mean Absolute Deviation?

• The mean of the data values.

• The absolute value of the mean.

• The variation of data values around the mode.

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

True or False: You can have negative numbers in Mean Absolute Deviation.

• True

• False

What does M.A.D stand for?

• Mean as Dirt

• Mean Average Deviation

• Crazy

• Mean Absolute Deviation

Which dot plot shows more consistency? a or b?

• a
• b

Tags

CCSS.7.SP.B.4

Megan and Javier wanted to understand the variability of their class’s scores on a recent test.

They agreed that some scores are unusually good and that some are unusually bad, and that those outliers don’t represent the typical student. Javier suggested that they shouldn’t count the upper 25% or the lower 25% of the scores. Instead, they should find the range of the remaining values.

What is the name of the measure Javier suggested?

• mean

• median

• mean absolute deviation (MAD)

• interquartile range (IQR)

True or false? :The larger the Mean Absolute Deviation the more consistent the data is.

• True
• False

Tags

CCSS.6.SP.B.5C

Arnold wants to convince his friend that one golfer is the most consistent among the others in the tournament.

Which argument below would show that Arnold was correct?

• The golfer has the lowest median score

• The golfer has the lowest mean score.

• The golfer has the greatest range of scores.

• The golfer has the lowest mean absolute deviation.

• The golfer with the lowest Mode.

Which is the correct Mean and Mean Absolute Deviation to the following numbers?

0, 0, 5, 6, 9 and 2

• Mean: 3.66

  MAD: 3

• Mean: 3

  MAD: 3.66

• Mean: 3

  MAD: 4

• Mean: 3.66

  MAD: 4

Ms. Andrew timed how long it took ten students in her class to solve a riddle. The results are shown in the dot plot.

Which of the following descriptions about the data are true?

Select all that apply.

• If the outlier were to leave the class, the MAD would be 0.88

• With the outlier, the MAD is greater than the MAD would be without the outlier.

• If the outlier were to leave the class, the MAD would be zero.

• With the outlier, the MAD is less than the MAD would be without the outlier.

Margaret wants to determine how consistent her grades have been in history class.

Her quiz scores are: 85, 86, 84, 88, 77, and 96.

What is the mean absolute deviation of Margaret’s scores?

• 24

• 20

• 4

• 5

• 86