INSTRUCTOR ANSWER GUIDE
OpenStax Introductory Business Statistics 2e
Instructor Answer Guide
,OpenStax Introductory Business Statistics 2e
Instructor Answer Guide
CHAPTER 2: DESCRIPTIVE STATISTICS
Exercise 1. Use the data to construct a line graph. In a survey, 40 people were asked
how many times they visited a store before making a major purchase. The
results are shown in Table 2.37.
Number of times in store Frequency Frequency
1 4
2 10
3 16
4 6
5 4
Table 2.37
Solution
Figure 2.27
Exercise 2. Use the data to construct a line graph. In a survey, several people were
asked how many years it has been since they purchased a mattress. The
results are shown in Table 2.38.
Years since last Frequency
purchase
0 2
1 8
2 13
3 22
4 16
5 9
Table 2.38
2
October 28, 2025
,OpenStax Introductory Business Statistics 2e
Instructor Answer and Solution Guide
Chapter 2: Descriptive Statistics
Solution
Exercise 3. Several children were asked how many TV shows they watch each day. The
results of the survey are shown in Table 2.39.
Number of TV Frequenc
Shows y
0 12
1 18
2 36
3 7
4 2
Table 2.39
Solution
Figure 2.28
Exercise 4. The students in Ms. Ramirez’s math class have birthdays in each of the four
seasons. Table 2.40 shows the four seasons, the number of students who have
birthdays in each season, and the percentage (%) of students in each group.
Construct a bar graph showing the number of students.
Seasons Number of students Proportion of population
Spring 8 24%
3
October 28, 2025
, OpenStax Introductory Business Statistics 2e
Instructor Answer Guide
Summer 9 26%
Autumn 11 32%
Winter 6 18%
Table 2.40
Solution
Exercise 5. Using the data from Mrs. Ramirez’s math class supplied in Exercise 2.4,
construct a bar graph showing the percentages.
Solution
Figure 2.29
Exercise 6. David County has six high schools. Each school sent students to participate
in a county-wide science competition. Table 2.41 shows the percentage
breakdown of competitors from each school, and the percentage of the entire
student population of the county that goes to each school. Construct a bar
graph that shows the population percentage of competitors from each school.
High Science competition Overall student
School population population
Alabaster 28.9% 8.6%
Concordia 7.6% 23.2%
Genoa 12.1% 15.0%
4
October 28, 2025
OpenStax Introductory Business Statistics 2e
Instructor Answer Guide
,OpenStax Introductory Business Statistics 2e
Instructor Answer Guide
CHAPTER 2: DESCRIPTIVE STATISTICS
Exercise 1. Use the data to construct a line graph. In a survey, 40 people were asked
how many times they visited a store before making a major purchase. The
results are shown in Table 2.37.
Number of times in store Frequency Frequency
1 4
2 10
3 16
4 6
5 4
Table 2.37
Solution
Figure 2.27
Exercise 2. Use the data to construct a line graph. In a survey, several people were
asked how many years it has been since they purchased a mattress. The
results are shown in Table 2.38.
Years since last Frequency
purchase
0 2
1 8
2 13
3 22
4 16
5 9
Table 2.38
2
October 28, 2025
,OpenStax Introductory Business Statistics 2e
Instructor Answer and Solution Guide
Chapter 2: Descriptive Statistics
Solution
Exercise 3. Several children were asked how many TV shows they watch each day. The
results of the survey are shown in Table 2.39.
Number of TV Frequenc
Shows y
0 12
1 18
2 36
3 7
4 2
Table 2.39
Solution
Figure 2.28
Exercise 4. The students in Ms. Ramirez’s math class have birthdays in each of the four
seasons. Table 2.40 shows the four seasons, the number of students who have
birthdays in each season, and the percentage (%) of students in each group.
Construct a bar graph showing the number of students.
Seasons Number of students Proportion of population
Spring 8 24%
3
October 28, 2025
, OpenStax Introductory Business Statistics 2e
Instructor Answer Guide
Summer 9 26%
Autumn 11 32%
Winter 6 18%
Table 2.40
Solution
Exercise 5. Using the data from Mrs. Ramirez’s math class supplied in Exercise 2.4,
construct a bar graph showing the percentages.
Solution
Figure 2.29
Exercise 6. David County has six high schools. Each school sent students to participate
in a county-wide science competition. Table 2.41 shows the percentage
breakdown of competitors from each school, and the percentage of the entire
student population of the county that goes to each school. Construct a bar
graph that shows the population percentage of competitors from each school.
High Science competition Overall student
School population population
Alabaster 28.9% 8.6%
Concordia 7.6% 23.2%
Genoa 12.1% 15.0%
4
October 28, 2025
