Measures of Variation

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

Which measure of variation is the difference between the first quartile and the third quartile?

• mean

• range

• interquartile range (IQR)

• median

Find the interquartile range (IQR) of this data (hint: this is the same data as the previous question)

Hours Sixth Graders Spent Playing Video Games This Week

7, 0, 10, 4, 20, 2, 11

• 11

• 2

• 7

• 9

What is the interquartile range (IQR) of this data? (reminder & hint: this is the same data as the past several problems) Minutes Spent Online at Target Waiting to Check Out 5, 4, 1, 10, 5, 2, 6, 5

• 5.2

• 3.5

• 9

• 2.5

What is the third quartile of this data? (reminder & hint: put the numbers in order from least to greatest first. And you will need this list for the next few problems) Minutes Spent Online at Target Waiting to Check Out 5, 4, 1, 10, 5, 2, 6, 5

• 5.5

• 5

• 6

• 2

Calculate the interquartile range of the following data

• 3

• 4

• 5

  
  

• 8

  
  

Find the interquartile range using the following data.
18, 15, 22, 16, 17, 15, 12, 22, 13

• 34

• 16

• 6

• 10

Order the data and find the Inter- Quartile Range (IQR)
2,3,3,3,4,4,4,5,5,5,5,6,6,6,6,6,7,7,8,8,8,9,9

• 3

• 4

• 5

• 6

True or False
To find the IQR (interquartile range) you have to add the Q3 + Q1.

• True

• False