7th Grade Math

Extra Practice EP25

Extra Practice

Multi-Part Lesson 9-2 (continued)

PART B PAGES 504–509

Draw a box-and-whisker plot for each set of data.

1. 2, 3, 5, 4, 3, 3, 2, 5, 6 2. 6, 7, 9, 10, 11, 11, 13, 14, 12, 11, 12


2. 15, 12, 21, 18, 25, 11, 17, 19, 20 4. 2, 24, 6, 13, 8, 6, 11, 4

ZOOS Use the box-and-whisker plot.

0 100 200 300 400 500 600

"SFB
   BDSFT


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4UBUFT

5. How many outliers are in the data?


6. Describe the distribution of the data. What can you say about the
   areas of the major zoos in the United States?

Multi-Part Lesson 9-3: Statistical Displays

PARTS A B PAGES 513–519

Display each set of data in a circle graph.

1. Car Sales
   Style Percent
   Sedan 55%
   SUV 30%
   Pickup truck 15%


2. Favorite Flavor of Ice Cream
   Flavor Number
   Vanilla 12
   Chocolate 15
   Strawberry 8

PARTS C D PAGES 520–525

For each problem, choose intervals and make a frequency table. Then

construct a histogram to represent the data.

1. Cost of a Movie Ticket at Selected Theaters
   $5.25 $6.50 $3.50 $3.75
   $7.50 $9.25 $10.40 $4.75
   $10.00 $4.50 $8.75 $7.25
   $3.50 $6.70 $4.20 $7.50
   2. Highest Recorded Wind Speeds
   for Selected U.S. Cities (mph)
   52 55 81 46 73 57
   75 54 58 76 46 58
   60 91 53 53 51 56
   80 60 73 46 49 47

ARCHITECTURE Use the histogram.

31–4041–5051–6061–7071–8081–90

4

6

2

0

8

Number of Buildings

10

Height (feet)

Heights of 45 Buildings

3. How many buildings are represented
   in the histogram?


4. Which interval represents the most
   number of buildings?


5. What percent of the buildings are
   taller than 70 feet?


6. What is the height of the tallest
   building?

EP2_EP36_ExtPract_M1_895130.indd EP25 1/6/10 11:46 AM