Question

Find the interquartile range (IQR) of the data in the box plot below.

cm
Amount of rain in Vietnam cities
(centimeters)
+
++
0 1 2
3
4
5
6
7
8
9
10
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Answer 1

1.5 cm

Explanation:

Interquartile range (IQR) = Q3 - Q1

From the box plot given, the third quartile (Q3) is the data value that falls exactly at the end of the edge of the rectangular box = 7 cm

The first quartile (Q1) is the data value exactly at the beginning of the edge of the box = 5.5 cm

Interquartile range (IQR) = 7 - 5.5 = 1.5 cm