Page 181 - Math Course 3 (Book 2)

Understanding Box-and-Whisker Plots

Interpret Data
Most deciduous trees range in height between 25
and 60 feet. However, some are as tall as 80 feet.
Examples Most evergreen trees range in height between 50
and 70 feet. However, some are as tall as 80 feet.

WEATHER Answer Most evergreen trees are taller
The box-and-whisker plot below shows the average than most deciduous trees.
percent of sunny days per year for selected cities
in each state. Half of the selected cities have an
average of sunny days under what percent?
Your Turn!

Draw a Box-and-Whisker Plot

20 30 40 50 60 70 80 90

Half of the selected cities have
Answer an average percent of sunny days
under 56%.

The box-and-whisker plot below shows the average
percent of sunny days per year for selected cities
in each state. What does the length of the box in
the box-and-whisker plot tell about the data?

TRANSPORTATION
The data listed below represents the time, in
20 30 40 50 60 70 80 90 minutes, required for students to travel from home
to school each day. Display the data in a box-and-
whisker plot.
The length of the box is short.
Answer This tells us that the data values
are clustered together. 14 32 7 45 18 22 26 9 4 18 15

Real World Example A.

TREES
The average maximum height, in feet, for selected B.
evergreen trees and deciduous trees is displayed.
How do the heights of evergreen trees compare
with the heights of deciduous trees?

C.
Deciduous
Trees

D.
Evergreen
Trees

Answer
0 25 50 75 100

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