Answer: D. The interquartile range (IQR) for Town A , 15° is less than the interquartile range for town B , 20°.
Step-by-step explanation:
The interquartile range is most suitable term to compare the spread of two different data displayed by box-whisker plot.
The formula for interquartile range :-
[tex]IQR=Q_3-Q_1[/tex]
For Town A , First quartile : [tex]Q_1=15[/tex]
Second quartile : [tex]Q_2=30[/tex]
[tex]IQR=30-15=15[/tex]
For Town B , First quartile : [tex]Q_1=20[/tex]
Second quartile : [tex]Q_2=40[/tex]
[tex]IQR=40-20=20[/tex]
Clearly , the interquartile range (IQR) for Town A , 15° is less than the interquartile range for town B , 20°.
