7th Grade Math

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More Statistical Displays

PART A B C

Multi-Part

Lesson 4

GLE 0706.5.2

Select, create, and use

appropriate graphical

representations of data.

SPI 0706.5.2 Select suitable

graph types (such as bar

graphs, histograms, line

graphs, circle graphs, box-

and-whisker plots, and stem-

and-leaf plots) and use them

to create accurate

representations of given

data. Also addressees

GLE 0706.1.7, GLE 0706.5.1,

SPI 0706.5.1.

540 Statistical Displays

Main Idea

Select, organize, and

construct appropriate

data displays.

Select an Appropriate Display

RECYCLING Ms. Stevens’s class weighed the total amount of paper that

was recycled each week during a ten-week period. The following

graphs are four ways they displayed the weekly weights of paper.

812162024283236404448525660

Weekly Recycling

Weekly Recycling

Stem Leaf

1

2

3

4

5

2 9

1

1 3 7

5

2 5 8

(^1) | 2 = 12
2
10–19 20–29 30–39 40–49 50–59
Number of
Weeks
4
3
1
Pounds of Paper
Weekly Recycling^ Weekly Recycling
10 –19
20% 20–29
10%
50–59
30%
30–39
40–4910% 30%

1. Which display(s) shows how many weeks the class collected
   exactly 31 pounds of paper?


2. Which display(s) most easily shows the number of weeks the class
   collected between 30 and 39 pounds of paper?

When deciding what type of display to use, ask these questions.

What type of information is given? What do you want the display to

show? How will the display be analyzed?

Select an Appropriate Display

SPORTS Select an appropriate display to show the number of

boys of different age ranges that participate in athletics.

Since the display will show an interval, a histogram would be an

appropriate display to represent this data.

a. Select an appropriate display for the percent of students in each

grade at a middle school.

534_545_C09_L4_895130.indd 540 1/11/10 9:46 AM