Find quartiles and the interquartile range

Question 1

Find the upper quartile (Q3) of: 13, 28, 5, 5, 13, 19, 28, 29, 50, 1, 22

Answer 

Question 2

A box plot of reaction times (hundredths of a second) shows: minimum 12, Q1 14, median 21, Q3 23, maximum 33. About what percentage of the data is greater than 23?

Answer 

Question 3

Find the interquartile range (IQR) of: 15, 59, 19, 59, 56, 47, 27, 11, 51

Answer 

Question 4

Find the lower quartile (Q1) of: 46, 25, 47, 19, 31, 18, 24

Answer 

Question 5

A box plot of reaction times (hundredths of a second) shows: minimum 19, Q1 22, median 26, Q3 31, maximum 42. What is the range?

Answer 

Question 6

Find the interquartile range (IQR) of: 38, 56, 50, 19, 19, 21, 40, 33, 51, 48

Answer 

Question 7

Find the upper quartile (Q3) of: 39, 20, 44, 32, 3, 14, 15, 37, 8, 8, 22

Answer 

Question 8

A box plot of reaction times (hundredths of a second) shows: minimum 19, Q1 22, median 29, Q3 31, maximum 39. About what percentage of the data is greater than 31?

Answer 

Question 9

Find the interquartile range (IQR) of: 32, 55, 41, 19, 59, 50, 56, 32

Answer 

Question 10

Find the lower quartile (Q1) of: 26, 20, 20, 9, 36, 1, 21, 5, 21, 3, 21

Answer 

Question 11

A box plot of reaction times (hundredths of a second) shows: minimum 9, Q1 15, median 18, Q3 20, maximum 29. What is the range?

Answer 

Question 12

Find the interquartile range (IQR) of: 25, 56, 42, 49, 24, 34, 19, 53, 11, 40

Answer 

Question 13

Find the lower quartile (Q1) of: 41, 4, 45, 20, 46, 22, 23, 22, 32, 37, 12

Answer 

Question 14

A box plot of reaction times (hundredths of a second) shows: minimum 18, Q1 20, median 27, Q3 29, maximum 41. About what percentage of the data is greater than 29?

Answer 

Question 15

Find the interquartile range (IQR) of: 17, 10, 32, 37, 18, 55, 41, 47, 22

Answer 

Question 16

Find the lower quartile (Q1) of: 21, 36, 10, 41, 40, 21, 49, 41, 41, 36, 2

Answer