Page 180 - Math Course 3 (Book 2)

Understanding Box-and-Whisker Plots
Mo. 12

Lesson 1 Fastest Growing Jobs

Occupation Job(1000s)

KEY CONCEPTS: Computer Engineer 622

1. Display data in a box-and-whisker plot. Computer Support 869
2. Interpret data in a box-and-whisker plot. Systems Analyst 1194

Database Administrator 155

MO. 12 - L1a Desktop Publishing 44
Paralegal/Legal Assistant 220
Interpreting Data in a
Box-and-Whisker Plots Home Health Aide 1179
Medical Assistant 398

Vocabulary A-Z Step 1
Find the least and greatest number. Then draw a
Let us learn some vocabulary number line that covers the range of the data.

box-and-whisker plot 0 150 300 450 600 750 900 1050 1200
A box-and-whisker plot divides a set of data into
four parts using the median and quartiles. Step 2
Find the median, the extremes, and the upper and
lower quartiles. Mark these points above the
number line.
lower extreme
or least value median UQ lower LQ: median: UQ: upper
LQ extreme: 187.5 510 1024 extreme:
upper extreme 44 1194
or greatest value

A box drawn around the quartile values, and 0 150 300 450 600 750 900 1050 1200
whiskers extend from each quartile to the next
data points. Step 3
Draw a box and the whiskers.

The box contains The whiskers extend
Let’s Begin the UQ and the LQ from each quartile to the
extreme data points.

Draw a Box-and-Whisker Plot
0 150 300 450 600 750 900 1050 1200
Example

Answer

JOBS
The projected number of employees in 2008 in the
fastest-growing occupations is shown. Display the
data in a box-and-whisker plot. 0 150 300 450 600 750 900 1050 1200

172