Quartiles and IQR

Find the median of the data.

12, 14, 15, 18, 20, 21, 22, 24

Mathematical Equivalence

OFF

Find the first quartile (Q₁) of the following data.

12, 14, 15, 18, 20, 21, 22, 24

Mathematical Equivalence

OFF

Find the third quartile (Q₃) of the following data.

12, 14, 15, 18, 20, 21, 22, 24

Mathematical Equivalence

OFF

Find the interquartile range (IQR) of the data.

12, 14, 15, 18, 20, 21, 22, 24

Mathematical Equivalence

OFF

The table shows the number of song downloads a group of friends made on Saturday.

Find the Range of the number of song downloads.

Mathematical Equivalence

ON

The median of the lower half of a data set (also called the lower quartile) is:

• Q2

• Q3

• Q1

• interquartile range (IQR)

33, 25, 42, 25, 31, 37, 46, 29, 38

What is the third quartile (Q3) of the data?

• 37

• 38

• 40

• 46

Find Q1 of the following set of scores

12, 9, 4, 6, 5, 8, 9, 4, 10, 2

• 10

• 4

• 9

• 6

What is the term for the median of the upper half of the data?

• Q3

• Q1

• Median

• Minimum

What is the IQR for 3, 6, 7, 12, 15, 18, 21

• 12

• 100

• 6

• 15