Question

The box plot below represents some data set. What is the interquartile range (IQR) of

the data?
-
42
45
48
51
54
57
60

Answer 1

IQR = 5

Explanation:

the IQR is the difference between the upper quartile Q₃ and the lower quartile Q₁

Q₃ is the value at the right side of the box plot , that is

Q₃ = 51

Q₁ is the value at the left side of the box plot , that is

Q₁ = 46

then

IQR = Q₃ - Q₁ = 51 - 46 = 5