Lesson 15: Quartiles and Interquartile Range | Unit 8: Data Sets and Distributions

Multiple Choice

Suppose that there are 20 numbers in a data set and that they are all different. How many of the values in this data set are between the first quartile and the third quartile?

• 7
• 10
• 8
• 9

Multiple Choice

Suppose that there are 20 numbers in a data set and that they are all different. How many of the values in this data set are between the first quartile and the median?

• 5
• 10
• 4
• 15

Multiple Choice

What is the median score in the word game based on the dot plot?

• 6
• 8
• 4
• 10

Multiple Choice

What is the first quartile (Q1) in the word game based on the dot plot showing the scores for 20 common words?

• 5.5
• 6.5
• 7.0
• 4.0

Multiple Choice

What is the third quartile (Q3) in the word game based on the dot plot showing the scores for 20 common words?

• 10
• 22
• 15
• 5

Multiple Choice

What is the interquartile range (IQR) in the word game based on the dot plot showing the scores for 20 common words?

• 4
• 2
• 8
• 6

Open Ended

Mai and Priya each bowl 10 games and record the scores. Mai’s median score is 120, and her IQR is 5. Priya’s median score is 118, and her IQR is 15. Whose scores probably have less variability? Explain how you know.