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Chapter 6
6-2
Statistics and Graphs
Pretest for Chapter 6
(Answers on page 344)
1. The following table shows how much consumers are willing to pay for digital music and the potential revenue that can
be derived from it.
Price Expectations of Digital Music
Price of digital song
Percent of
market reached
Potential revenue
$0.01
89%
$0.50
82%
$0.99
74%
$1.49
42%
$1.99
39%
N/A
$992.20
$1772.89
$1514.44
$1878.16
Source: Data from ClickZ Network.
a. What percent of the market will be reached if the price per song is $0.50?
b. What is the potential revenue when the price is $0.50 per song?
2. The pictograph shows the number of hamburgers sold at
Burger King, Del Taco, Jack in the Box, McDonald’s,
and Wendy’s. Each symbol represents 100 hamburgers.
3. The bar graph shows the percent of people that have
downloaded music files from the Internet for playback
at another time.
Age 12–17
56%
Burger King
Age 18–24
44%
Del Taco
Age 25–34
29%
Jack in the Box
Age 35–44
19%
McDonald's
0
10
Wendy’s
20
30
40
50
60
70
80
Percent saying yes
Source: Data from Edison Media Research.
4. In the same survey, the percents of consumers who have
downloaded music and said they are purchasing more
music are as follows:
Age
12–17
18–24
25–34
35–44
Percent
18%
18%
20%
27%
a. Which of the four age brackets has the highest percent of people that have downloaded music files?
b. What percent of the 18–24 age bracket
downloaded music files?
5. The following graph shows the total and senior population (in millions) from 1950 to 2050.
500
Number (in millions)
a. Which brand sold the least?
b. How many Burger King hamburgers were sold?
400
300
Total
population
Projected
200
100
65 years of
age and over
0
1950 1960 1970 1980 1990 2000 2010 2020 2030 2040 2050
Year
Use the age brackets as the categories and the percents
from 0 to 40 as the frequencies and make a vertical bar
graph for the data.
Source: Data from Centers for Disease Control and Prevention.
a. What is the approximate projected total population
for the year 2050?
b. What is the projected 65 years of age and over
population for the year 2050?
bel23601_ch06_a.qxd 12/7/04 3:57 PM Page 343
6-3
Pretest for Chapter 6
6. The chart shows the projected online spending (in
billions) for college students, teens, and kids. Make a
line graph of the spending for teens using a 1–5 billion
vertical scale.
343
7. The circle graph shows the percent of people believing
that the most popular place for proposing is as shown in
the graph.
Favorite places for proposing
Don’t know 10%
Online Spending Forecast (in billions)
2003
2004
2005
2006
College Students
Teens
Kids
$4.5
$5.5
$6.4
$7.4
$1.7
$2.6
$3.6
$4.8
$0.2
$0.4
$0.7
$1.0
Source: Data from Jupiter Research, October 2001.
On vacation
13%
Restaurant
13%
Home
42%
Public place 22%
Source: Data from StrategyOne for Korbel Champagne.
a. What percent of the people don’t know what the
most popular place is?
b. If 500 people were surveyed, how many chose
“don’t know”?
8. Make a circle graph to show the ways we commute to
work:
Category
Percent
Drive alone (DA)
Car pool (CP)
Public transit (PT)
Other (O)
9. The table shows the number of calories in five different
hamburgers.
Category
70%
15%
5%
10%
Burger King
Del Taco
McDonald’s
Jack in the Box
Wendy’s
Source: Data from National Public
Transportation Survey.
Calories
320
280
280
250
270
Source: Data from Fast Food Source.com.
a. Find the mean number of calories for the
hamburgers.
b. Find the median number of calories for the
hamburgers.
c. Find the mode(s) of the number of calories.
10. A student is taking five courses with the credit hours
and points earned shown. To one decimal place, what is
the student’s GPA?
Course
Credit Hours
Grade
V
W
X
Y
Z
3
3
4
1
3
A(4)
B(3)
C(2)
A(4)
B(3)