Center and Variation

Find the interquartile range using the following.
Minimum:  1
Q1:  3
Median:  5
Q3:  7
Maximum:  9

• 8

• 4

• 5

• 10

What is the interquartile range of the data set below?

• 3

• 6

• 2

• 8

Find the IQR using the following data.

50, 60, 82, 86, 94, 110

• 60

• 84

• 34

• 50

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

• 3

• 5

• 1

• 2

Find the Mean Absolute Deviation: (MAD)

10, 9, 3, 8, 10.

• 3

• 5

• 1

• 2

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

• 43

• 20

• 10

• 12

Which class has the higher test score median? 

• Class #1

• Class # 2 

• The medians are equal

• The median is not shown here. 

Which class was more consistent in their Algebra Scores?

• Class #2

• Class #1

• Both classes had the same consistency.

• 50%

Which of the following are measures of variation?

• mean, median, mode

• range and interquartile range (IQR)

• volume

• area

Which measure of variation is the difference between the maximum and minimum of the data?

• mean

• interquartile range (IQR)

• range

• median