Understanding Quartiles and IQR

Given the data set: 3, 7, 8, 5, 12, 14, 21, 13, 18, 9, find the first quartile (Q1).

• 5

• 7

• 8

• 9

For the data set: 4, 8, 15, 16, 23, 42, 50, 60, 70, 80, find the second quartile (Q2), also known as the median.

• 23

• 42

• 50

• 60

Calculate the third quartile (Q3) for the data set: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50.

• 35

• 37.5

• 40

• 45

Find the interquartile range (IQR) for the data set: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.

• 8

• 10

• 12

• 14

Given the data set: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, find the first quartile (Q1).

• 3

• 4

• 5

• 6

For the data set: 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, find the second quartile (Q2).

• 12

• 14

• 15

• 16

Calculate the third quartile (Q3) for the data set: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30.

• 21

• 22.5

• 24

• 27

Find the interquartile range (IQR) for the data set: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100.

• 40

• 45

• 50

• 55

Given the data set: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, find the first quartile (Q1).

• 4

• 5

• 6

• 7

For the data set: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, find the second quartile (Q2).

• 20

• 25

• 27.5

• 30