Question 1

SCENARIO 2-6
A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether
they went bar hopping the weekend before the midterm or spent the weekend studying, and whether
they did well or poorly on the midterm.The following table contains the result. 
-Referring to Scenario 2-6, if the sample is a good representation of the population, we can expect
_______ percent of those who did poorly on the midterm to have spent the weekend studying.

Accepted Answer

A)  10 
B)  22.22 
C)  45 
D)  50

Question 2

SCENARIO 2-18
The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction
with their school with the higher scores represent higher level of satisfaction. 
-Referring to Scenario 2-18, what was the lowest level of satisfaction?

Accepted Answer

The answer of SCENARIO 2-18
The stem-and-leaf display below shows the...

Question 3

SCENARIO 2-10
The histogram below represents scores achieved by 200 job applicants on a personality profile. 
-Referring to the histogram from Scenario 2-10, half of the job applicants scored below
________.

Accepted Answer

The answer of SCENARIO 2-10
The histogram below represents scores achieved...

Question 4

SCENARIO 2-1
An insurance company evaluates many numerical variables about a person before deciding on an
appropriate rate for automobile insurance.A representative from a local insurance agency selected a
random sample of insured drivers and recorded, X, the number of claims each made in the last 3
years, with the following results. 
-Referring to Scenario 2-1, how many total claims are represented in the sample?

Accepted Answer

A)  15 
B)  50 
C)  111 
D)  250

Question 5

SCENARIO 2-10
The histogram below represents scores achieved by 200 job applicants on a personality profile. 
-Referring to the histogram from Scenario 2-10, _______ percent of the applicants scored below
20 or at least 50.

Accepted Answer

The answer of SCENARIO 2-10
The histogram below represents scores achieved...

Question 6

True or False: Apple Computer, Inc.collected information on the age of their customers.
Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the
age among its customers, it can use a Pareto chart.

Accepted Answer

A) True 
 B)False

Question 7

SCENARIO 2-18
The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction
with their school with the higher scores represent higher level of satisfaction. 
-Referring to Scenario 2-18, how many students have a satisfaction level in the 50s?

Accepted Answer

The answer of SCENARIO 2-18
The stem-and-leaf display below shows the...

Question 8

True or False: When you work with many variables, you must be mindful of the limits of the
information technology as well as the limits of the ability of your readers to perceive and comprehend
your results.

Accepted Answer

A) True 
 B)False

Question 9

SCENARIO 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the
continental United States reported by one long-distance carrier. 
-Referring to Scenario 2-5, if 100 calls were sampled, _______ of them would have lasted less
Than 15 minutes.

Accepted Answer

A)  26 
B)  74 
C)  10 
D)  None of the above.

Question 10

SCENARIO 2-13
Given below is the stem-and-leaf display representing the amount of detergent used in gallons (with
leaves in 10ths of gallons)in a day by 25 drive-through car wash operations in Phoenix.  
2-36 Organizing and Visualizing Variables
-Referring to Scenario 2-13, construct a relative frequency or percentage distribution for the
detergent data, using "9.0 but less than 10.0" as the first class.

Accepted Answer

The answer of SCENARIO 2-13
Given below is the stem-and-leaf display...

Question 11

SCENARIO 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the
continental United States reported by one long-distance carrier. 
-Referring to Scenario 2-5, if 100 calls were sampled, _______ of them would have lasted less
Than 5 minutes or at least 30 minutes or more.

Accepted Answer

A)  35 
B)  37 
C)  39 
D)  None of the above.

Question 12

SCENARIO 2-12
The table below contains the opinions of a sample of 200 people broken down by gender about the
latest congressional plan to eliminate anti-trust exemptions for professional baseball. 
-Referring to Scenario 2-12, _______ percent of the 200 were against the plan.

Accepted Answer

The answer of SCENARIO 2-12
The table below contains the opinions...

Question 13

True or False: In graphing two categorical data, the side-by-side bar chart is best suited when
comparing joint responses.

Accepted Answer

A) True 
 B)False

Question 14

True or False: In general, a frequency distribution should have at least 8 class groups but no
more than 20.

Accepted Answer

A) True 
 B)False

Question 15

SCENARIO 2-16
The figure below is the percentage polygon for the amount of calories for a sample of 36 pizzas
products where the upper limits of the intervals are: 310, 340, 370, 400 and 430.
Percentage Polygon for Calories 
-Referring to Scenario 2C-16alo, rriouges hly what percentage of pizza products contains between 400
And 430 calories?

Accepted Answer

A)  0% 
B)  11% 
C)  89% 
D)  100%

Question 16

You have collected data on the approximate retail price (in $)and the energy cost per year (in $)
Of 15 refrigerators.Which of the following is the best for presenting the data?

Accepted Answer

A)  A pie chart. 
B)  A scatter plot 
C)  A side-by-side bar chart. 
D)  A contingency table.

Question 17

True or False: A histogram can have gaps between the bars, whereas bar charts cannot have
gaps.

Accepted Answer

A) True 
 B)False

Question 18

SCENARIO 2-7 
-Referring to Scenario 2-7, locate the first leaf, i.e., the lowest valued leaf with the lowest valued
stem.This represents a wait of ________ months.

Accepted Answer

The answer of SCENARIO 2-7 
-Referring to Scenario 2-7, locate...

Question 19

True or False: Apple Computer, Inc.collected information on the age of their customers.
Suppose the youngest customer was 12 and the oldest was 72.To study the percentage of their
customers who are below a certain age, it can use an ogive.

Accepted Answer

A) True 
 B)False

Question 20

True or False: The Guidelines for Developing Visualizations recommend always including a
scale for each axis if the chart contains axes.

Accepted Answer

A) True 
 B)False

Exam 2: Organizing and Visualizing

SCENARIO 2-18 The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction with their school with the higher scores represent higher level of satisfaction. -Referring to Scenario 2-18, what was the lowest level of satisfaction?

SCENARIO 2-10 The histogram below represents scores achieved by 200 job applicants on a personality profile. -Referring to the histogram from Scenario 2-10, half of the job applicants scored below ________.

SCENARIO 2-10 The histogram below represents scores achieved by 200 job applicants on a personality profile. -Referring to the histogram from Scenario 2-10, _______ percent of the applicants scored below 20 or at least 50.

True or False: Apple Computer, Inc.collected information on the age of their customers. Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the age among its customers, it can use a Pareto chart.

SCENARIO 2-18 The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction with their school with the higher scores represent higher level of satisfaction. -Referring to Scenario 2-18, how many students have a satisfaction level in the 50s?

True or False: When you work with many variables, you must be mindful of the limits of the information technology as well as the limits of the ability of your readers to perceive and comprehend your results.

SCENARIO 2-5 The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. -Referring to Scenario 2-5, if 100 calls were sampled, _______ of them would have lasted less Than 15 minutes.

SCENARIO 2-12 The table below contains the opinions of a sample of 200 people broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. -Referring to Scenario 2-12, _______ percent of the 200 were against the plan.

True or False: In graphing two categorical data, the side-by-side bar chart is best suited when comparing joint responses.

True or False: In general, a frequency distribution should have at least 8 class groups but no more than 20.

You have collected data on the approximate retail price (in $) and the energy cost per year (in $) Of 15 refrigerators.Which of the following is the best for presenting the data?

True or False: A histogram can have gaps between the bars, whereas bar charts cannot have gaps.

SCENARIO 2-7 -Referring to Scenario 2-7, locate the first leaf, i.e., the lowest valued leaf with the lowest valued stem.This represents a wait of ________ months.

True or False: Apple Computer, Inc.collected information on the age of their customers. Suppose the youngest customer was 12 and the oldest was 72.To study the percentage of their customers who are below a certain age, it can use an ogive.

True or False: The Guidelines for Developing Visualizations recommend always including a scale for each axis if the chart contains axes.