Question 1

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. $$\begin{array} { l } 
9\mid 147 \
10 \mid 02238 \
11 \mid 135566777 \
12 \mid 223489 \
13 \mid 02
\end{array}$$
-Referring to Scenario 2-13, if a relative frequency or percentage distribution for the detergent
data is constructed, using "9.0 but less than 10.0 gallons" as the first class, what percentage of
drive-through car wash operations use at least 10 gallons of detergent in a day?

Accepted Answer

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

Question 2

SCENARIO 2-9
The frequency distribution below represents the rents of 250 randomly selected federally subsidized
apartments in a small town. $\begin{array}{lr}
\text { Rent in } \$ &\text { Frequency }\
\hline\hline1,100 \text { but less than } 1,200 & 113 \
1,200 \text { but less than } 1,300 & 85 \
1,300 \text { but less than } 1,400 & 32 \
1,400 \text { but less than } 1,500 & 16 \
1,500 \text { but less than } 1,600 & 4
\end{array}$

-Referring to Scenario 2-9, ________ apartments rented for at least $1,200 but less than $1,400.

Accepted Answer

The answer of SCENARIO 2-9
The frequency distribution below represents the...

Question 3

SCENARIO 2-14
The table below contains the number of people who own a portable Blu-ray player in a sample of 600
broken down by gender. $$\begin{array}{l}
\text { Own a Portable }\
\begin{array} { l c c } 
\text { Blu-ray player } & \text { Male } & \text { Female } \
\hline \text { Yes } & 96 & 40 \
\text { No } & 224 & 240 \
\hline
\end{array}
\end{array}$$
-Referring to Scenario 2-14, of those who owned a portable Blu-ray player in the sample,
________ percent were females.

Accepted Answer

The answer of SCENARIO 2-14
The table below contains the number...

Question 4

Percentage polygons are plotted at the boundaries of the class groupings.

Accepted Answer

A) True 
 B)False

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

SCENARIO 2-14
The table below contains the number of people who own a portable Blu-ray player in a sample of 600
broken down by gender. $$\begin{array}{l}
\text { Own a Portable }\
\begin{array} { l c c } 
\text { Blu-ray player } & \text { Male } & \text { Female } \
\hline \text { Yes } & 96 & 40 \
\text { No } & 224 & 240 \
\hline
\end{array}
\end{array}$$
-Referring to Scenario 2-14, of the males in the sample, ________ percent owned a portable
Blu-ray player.

Accepted Answer

The answer of SCENARIO 2-14
The table below contains the number...

Question 7

SCENARIO 2-19-A
You are the quality control manager of a water bottles company. One of the biggest complaints in the
past years has been the breakage and, hence, the concern on the durability of the connector between
the lid and the bottle which many users use as a handle for the bottles. To collect evidence before
implementing any modification to the production process, your department has subjected 50 water
bottles to a durability test and the following data on the number of times the handles have been used
to lift the bottles before they break are contained in the file Scenario2-19-DataA.XLSX. $$\begin{array} { l l l l l l l l l l } 
495 & 499 & 502 & 500 & 491 & 498 & 498 & 495 & 488 & 516 \
513 & 486 & 504 & 503 & 493 & 504 & 489 & 500 & 495 & 499 \
501 & 507 & 511 & 496 & 486 & 497 & 510 & 504 & 493 & 482 \
511 & 502 & 520 & 514 & 486 & 514 & 500 & 505 & 512 & 500 \
504 & 498 & 503 & 514 & 474 & 489 & 488 & 506 & 517 & 490
\end{array}$$
-Referring to Scenario 2-19-A, based on the cumulative percentage polygon or cumulative
percentage distribution constructed using "473 but less than 480" as the first class, the percentage
of bottles with handles that broke after being used for lifting at least 487 times would be
________.

Accepted Answer

The answer of SCENARIO 2-19-A
You are the quality control manager...

Question 8

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. $$\begin{array} { l l } 
\text { Time (in Minutes) } & \begin{array} { l } 
\text { Relative } \
\text { Frequency }
\end{array} \
\hline 0 \text { but less than } 5 & 0.37 \
5 \text { but less than } 10 & 0.22 \
10 \text { but less than } 15 & 0.15 \
15 \text { but less than } 20 & 0.10 \
20 \text { but less than } 25 & 0.07 \
25 \text { but less than } 30 & 0.07 \
30 \text { or more } & 0.02
\end{array}$$
-Referring to Scenario 2-5, if 100 calls were sampled, _______of them would have lasted 20 minutes or more.

Accepted Answer

A)  26 
B)  16 
C)  74 
D)  None of the above.

Question 9

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 percentage polygon.

Accepted Answer

A) True 
 B)False

Question 10

SCENARIO 2-8
The Stem-and-Leaf display represents the number of times in a year that a random sample of 100
"lifetime" members of a health club actually visited the facility. $$\begin{array} { l l } 
\text { Stem } & \text { Leaves } \
\hline0 & 012222233333344566666667789999 \ 
1 & 1111222234444455669999 \
2 & 00011223455556889 \
3 & 0000446799 \
4 & 011345567 \
5 & 0077 \
6 & 8 \
7 & 67 \
8 & 3 \
9 & 0247
\end{array}$$
-Referring to Scenario 2-8, if a frequency distribution with equal sized classes was made from this
data, and the first class was "0 but less than 10," the class midpoint of the third class would be
________.

Accepted Answer

The answer of SCENARIO 2-8
The Stem-and-Leaf display represents the number...

Question 11

A survey of 150 executives were asked what they think is the most common mistake candidates make during job interviews. Six different mistakes were given. Which of the
Following is the best for presenting the information?

Accepted Answer

A)  A bar chart. 
B)  A histogram 
C)  A stem-and-leaf display. 
D)  A contingency table.

Question 12

One of the developing countries is experiencing a baby boom, with the number of births rising for the fifth year in a row, according to a BBC News report. Which of the following is best for
Displaying this data?

Accepted Answer

A)  A Pareto chart 
B)  A two-way classification table 
C)  A histogram 
D)  A time-series plot

Question 13

SCENARIO 2-14
The table below contains the number of people who own a portable Blu-ray player in a sample of 600
broken down by gender. $$\begin{array}{l}
\text { Own a Portable }\
\begin{array} { l c c } 
\text { Blu-ray player } & \text { Male } & \text { Female } \
\hline \text { Yes } & 96 & 40 \
\text { No } & 224 & 240 \
\hline
\end{array}
\end{array}$$
-Referring to Scenario 2-14, if the sample is a good representation of the population, we can
expect _______ percent of the females in the population will not own a portable Blu-ray player.

Accepted Answer

The answer of SCENARIO 2-14
The table below contains the number...

Question 14

SCENARIO 2-20-B
A recent consumer survey on holiday shopping reveals the following information on the types of
stores at which consumers plan to shop (The table is also available in the file Scenario2-20-
DataB.xlsx: $$\begin{array} { | l | c | } 
\hline \text { Types of Stores } & \% \text { of Customers } \
\hline \text { Stand-alone "big box" stores } & 54 \
\hline \text { Traditional mall } & 61 \
\hline \text { Local independent stores not in a mall } & 35 \
\hline \text { Strip mall or mini mall } & 25 \
\hline \text { Town hall mall } & 14 \
\hline \text { I do not plan to shop at any of these } & 9 \
\hline
\end{array}$$
-Referring to Scenario 20-20-B, construct a pie chart for the types of stores customers plan to
shop at.

Accepted Answer

The answer of SCENARIO 2-20-B
A recent consumer survey on holiday...

Question 15

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. $$\begin{array} { | l | l | l | } 
\hline & \text { Did Well in Midterm } & \text { Did Poorly in Midterm } \
\hline \text { Studying for Exam } & 80 & 20 \
\hline \text { Went Bar Hopping } & 30 & 70 \
\hline
\end{array}$$
-Referring to Scenario 2-6, if the sample is a good representation of the population, we can expect _______ percent of the students in the population to spend the weekend studying and do poorly
On the midterm.

Accepted Answer

A)  10 
B)  20 
C)  45 
D)  50

Question 16

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. $$\begin{array} { | l | l | l | } 
\hline & \text { Did Well in Midterm } & \text { Did Poorly in Midterm } \
\hline \text { Studying for Exam } & 80 & 20 \
\hline \text { Went Bar Hopping } & 30 & 70 \
\hline
\end{array}$$
-Referring to Scenario 2-6, if the sample is a good representation of the population, we can expect _______ percent of those who spent the weekend studying to do poorly on the midterm.

Accepted Answer

A)  10 
B)  20 
C)  45 
D)  50

Question 17

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. $$\begin{array} { l } 
9\mid 147 \
10 \mid 02238 \
11 \mid 135566777 \
12 \mid 223489 \
13 \mid 02
\end{array}$$
-Referring to Scenario 2-13, construct a frequency distribution for the detergent data, using "9.0
but less than 10.0 gallons" as the first class.

Accepted Answer

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

Question 18

SCENARIO 2-19-A
You are the quality control manager of a water bottles company. One of the biggest complaints in the
past years has been the breakage and, hence, the concern on the durability of the connector between
the lid and the bottle which many users use as a handle for the bottles. To collect evidence before
implementing any modification to the production process, your department has subjected 50 water
bottles to a durability test and the following data on the number of times the handles have been used
to lift the bottles before they break are contained in the file Scenario2-19-DataA.XLSX. $$\begin{array} { l l l l l l l l l l } 
495 & 499 & 502 & 500 & 491 & 498 & 498 & 495 & 488 & 516 \
513 & 486 & 504 & 503 & 493 & 504 & 489 & 500 & 495 & 499 \
501 & 507 & 511 & 496 & 486 & 497 & 510 & 504 & 493 & 482 \
511 & 502 & 520 & 514 & 486 & 514 & 500 & 505 & 512 & 500 \
504 & 498 & 503 & 514 & 474 & 489 & 488 & 506 & 517 & 490
\end{array}$$
-Referring to Scenario 2-19-A, construct a frequency distribution using "473 but less than 480"
as the first class.

Accepted Answer

The answer of SCENARIO 2-19-A
You are the quality control manager...

Question 19

The Guidelines for Developing Visualizations recommend using the simplest
possible visualization.

Accepted Answer

A) True 
 B)False

Question 20

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. $$\begin{array} { l l } 
\text { Time (in Minutes) } & \begin{array} { l } 
\text { Relative } \
\text { Frequency }
\end{array} \
\hline 0 \text { but less than } 5 & 0.37 \
5 \text { but less than } 10 & 0.22 \
10 \text { but less than } 15 & 0.15 \
15 \text { but less than } 20 & 0.10 \
20 \text { but less than } 25 & 0.07 \
25 \text { but less than } 30 & 0.07 \
30 \text { or more } & 0.02
\end{array}$$
-Referring to Scenario 2-5, what is the width of each class?

Accepted Answer

A)  1 minute 
B)  5 minutes 
C)  2% 
D)  100%

Exam 2: Organizing and Visualizing

Percentage polygons are plotted at the boundaries of the class groupings.

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.

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 percentage polygon.

A survey of 150 executives were asked what they think is the most common mistake candidates make during job interviews. Six different mistakes were given. Which of the Following is the best for presenting the information?

One of the developing countries is experiencing a baby boom, with the number of births rising for the fifth year in a row, according to a BBC News report. Which of the following is best for Displaying this data?

The Guidelines for Developing Visualizations recommend using the simplest possible visualization.