Basic Statistics Interquartile

Calculate the interquartile range of the following data

17, 18, 18, 19, 20, 21, 21, 23, 25

• 3
• 4
• 5

  
  

• 8

  
  

What value is the lower quartile (Q1)?

• 66
• 58
• 60
• 64

What data value is the upper quartile (Q3)?

• 64
• 62
• 66
• 58

What is the interquartile range (IQR)?

• 4
• 64
• 60
• 8

What is the interquartile range?

• 4
• 6
• 2
• 8

What is the interquartile range (IQR) of the data set?

• 20
• 25
• 5
• 10

What is the interquartile range?

• 4
• 6
• 2
• 8

Mrs. Jones surveyed the class for the number of letters in their given first name. The data is recorded below.
{5, 8, 6, 5, 4, 9, 8, 7, 6, 3, 8, 7, 5, 6, 7, 8}
What is the interquartile range of the data?

• 2
• 3
• 7
• 8

The data below shows the number of hours boys and girls spent studying for a test.
Boys: {2, 1, 3, 1, 2, 2}
Girls: {4, 1, 3, 2, 2, 4}
What is the difference in the interquartile range between the girls and boys?

• 1
• 2
• 3
• 5

The data shows the test scores of four different classes.
Algebra: {87, 91, 64, 88, 74}
Geometry: {98, 86, 84, 91, 79}
Statistics: {87, 72, 84, 88, 91}
Pre-Algebra: {63, 82, 78, 71, 74}
Which class had the smallest interquartile range?

• Algebra
• Geometry
• Statistics
• Pre-Algebra