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20 UNIT 1 Exploring One-Variable Data

(a) Describe what this graph reveals about lottery Multiple Choice Select the best answer for each question.
ticket buying habits among the different education 18. For which of the following would it be inappropriate to
groups. display the data with a single pie chart?
(b) Would it be appropriate to make a pie chart for this (A) The distribution of car colors for vehicles pur-
data set? Explain your answer. chased in the last month
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For Investigation Apply the skills from the section in a new (B) The distribution of unemployment percentages for
context or nonroutine way. each of the 50 states
16. Choropleth maps A choropleth map is a graphical (C) The distribution of favorite sport for a sample of
representation of data by geographic region in which 30 middle school students
values are depicted by color. For instance, the choro- (D) The distribution of shoe type worn by shoppers at a
pleth map presented here shows the percentage of peo- local mall
27
ple who were internet users in each country in 2020.
Write a thorough analysis of what the graph shows. Be (E) The distribution of presidential candidate prefer-
sure to include a comparison of internet use in differ- ence for voters in a state
ent regions of the world. 19. The following bar graph shows the distribution of favor-
ite subject for a sample of 1000 students. What is the
most serious problem with the graph?

280
260
Number of students 220
240
200
180
160
140
Internet use share (%) 120
0–20 40–60 80–100 100
20–40 60–80 n.a. Math Science English Social Foreign Fine
studies language arts
Favorite subject
17. Cow pie chart? Methane is a greenhouse gas that may
contribute to climate change. The modified pie chart (A) The subjects are not listed in the correct order.
shown here displays data on the sources of methane (B) This distribution should be displayed with a pie
28
emissions in the United States. Write a thorough chart.
analysis of what the graph shows. Be sure to include a
comparison of methane emissions by beef cows, dairy (C) The vertical axis should show the percentage of
cows, and pigs. students.
(D) The vertical axis should start at 0 rather than 100.

The U.S. methane breakdown (E) The foreign language bar should be broken up by
language.
back end front end
Coal mining Others 20% 2.6% BEEF 97.4% Recycle and Review Practice what you learned in previous
8% 10% sections.
Livestock 20. Hotels (1A) A high school lacrosse team is planning to
production go to Buffalo for a three-day tournament. The tourna-
Land lls 35% 11% 43% DAIRY 57% ment’s sponsor provides a list of available hotels, along
17%
with some information about each hotel. The following
Oil and gas table displays data about hotel options. Identify the
production 4% 89% PORK 11%
30% individuals and variables in this data set. Classify each
variable as categorical or quantitative.

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