Solution and Answer Guide: CammCochranFryOhlmannAndersonSweeneyWilliams, Essentials of Statistics for Business

Solution and Answer Guide: Camm/Cochran/Fry/Ohlmann/Anderson/Sweeney/Williams, Essentials of Statistics for Business

and Economics, 10e 9780357716014; Chapter 1: Data and Statistics

1 © 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.Solution and Answer Guide Camm/Cochran/Fry/Ohlmann/Anderson/Sweeney/Williams, Essentials of Statistics for Business

and Economics, 10e 9780357716014; Chapter 1: Data and Statistics

Table of Contents Supplementary Exercises .............................................................................................................. 1 Supplementary Exercises 1.Wall Street Journal Subscriber Characteristics. A Wall Street Journal (WSJ) subscriber survey asked 46 questions about subscriber characteristics and interests. State whether each of the following questions provides categorical or quantitative data. LO 2 a.What is your age?b.Are you married?c.When did you first start reading the WSJ? High school, college, early career, midcareer, late career, or retirement?d.How long have you been in your present job or position?e.What type of vehicle are you considering for your next purchase? Nine response categories include sedan, sports car, SUV, minivan, and so on.

Solutions:

a.Quantitative b.Categorical c.Categorical d.Quantitative e.Categorical 2.Comparing Tablet Computers. Tablet PC Comparison provides a wide variety of information about tablet computers. The company’s website enables consumers to easily compare different tablets using factors such as cost, type of operating system, display size, battery life, and CPU manufacturer. A sample of 10 tablet computers is shown in Table 1.6 (Tablet PC Comparison website). LO 1, 2 a.How many elements are in this data set?b.How many variables are in this data set?c.Which variables are categorical and which variables are quantitative?d.What type of measurement scale is used for each of the variables?All Chapters/Supplement files download link at the end of this file. 1 / 4

Solution and Answer Guide: Camm/Cochran/Fry/Ohlmann/Anderson/Sweeney/Williams, Essentials of Statistics for Business

and Economics, 10e 9780357716014; Chapter 1: Data and Statistics

2 © 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.

Solutions:

• The 10 elements are the 10 tablet computers.
• Five variables: Cost ($), Operating System, Display Size (inches), Battery Life (hours), and

CPU Manufacturer

c. Categorical variables: Operating System and CPU Manufacturer

Quantitative variables: Cost ($), Display Size (inches), and Battery Life (hours)

• Variable Measurement Scale

Cost ($) Ratio Operating system Nominal Display size (inches) Ratio Battery life (hours) Ratio CPU manufacturer Nominal

3. Tablet PCs: Cost, CPU, and Operating System. Refer to Table 1.6. LO 3

• What is the average cost for the tablets?
• Compare the average cost of tablets with a Windows operating system to the average cost of

tablets with an Android operating system.

• What percentage of tablets use a CPU manufactured by TI OMAP?
• What percentage of tablets use an Android operating system?

Solutions:

• Average cost = 5829/10 = $582.90
• Average cost with a Windows operating system = 3616/5 = $723.20

Average cost with an Android operating system = 1714/4 = $428.5 The average cost with a Windows operating system is much higher. 2 / 4

Solution and Answer Guide: Camm/Cochran/Fry/Ohlmann/Anderson/Sweeney/Williams, Essentials of Statistics for Business

and Economics, 10e 9780357716014; Chapter 1: Data and Statistics

3 © 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.

• Ten of 10 or 20% use a CPU manufactured by TI OMAP
• Four of 10 or 40% use an Android operating system
• Comparing Phones. Table 1.7 shows data for eight phones (Consumer Reports). The Overall

Score, a measure of the overall quality for the phone, ranges from 0 to 100. Voice Quality has possible ratings of poor, fair, good, very good, and excellent. Talk Time is the manufacturer’s claim of how long the phone can be used when it is fully charged. LO 1, 2

• How many elements are in this data set?
• For the variables Price, Overall Score, Voice Quality, and Talk Time, which variables are

categorical and which variables are quantitative?

• What scale of measurement is used for each variable?

Solutions:

• There are eight elements in this data set; each element corresponds to one of the eight

models of cordless telephones.

b. Categorical variables: Voice Quality and Handset on Base

Quantitative variables: Price, Overall Score, and Talk Time

c. Price: ratio measurement

Overall score: interval measurement

Voice quality: ordinal measurement

Handset on base: nominal measurement

Talk time: ratio measurement

• Summarizing Phone Data. Refer to the data set in Table 1.7. LO 3
• What is the average price for the phones?
• What is the average talk time for the phones?
• What percentage of the phones have a voice quality of excellent?

Solutions:

• Average price = 545/8 = $68.13 3 / 4

Solution and Answer Guide: Camm/Cochran/Fry/Ohlmann/Anderson/Sweeney/Williams, Essentials of Statistics for Business

and Economics, 10e 9780357716014; Chapter 1: Data and Statistics

4 © 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.

• Average talk time = 71/8 = 8.875 hours

c. Percentage rated Excellent: 2 of 8, 2/8 = 0.25, or 25%

• New Automobile Owners Survey. J.D. Power and Associates surveys new automobile owners

to learn about the quality of recently purchased vehicles. The following questions were asked in a J.D. Power Initial Quality Survey.

• Did you purchase or lease the vehicle?
• What price did you pay?
• What is the overall attractiveness of your vehicle’s exterior? (Unacceptable, Average,

Outstanding, or Truly Exceptional)

• What is your average miles per gallon?
• What is your overall rating of your new vehicle? (1- to 10-point scale with 1 Unacceptable and

10 Truly Exceptional) Indicate whether each question provides categorical or quantitative data. LO 2

Solutions:

• Categorical
• Quantitative
• Categorical
• Quantitative
• Quantitative
• Airline Customer Satisfaction. Many service companies collect data via a follow-up survey of

their customers. For example, to ascertain customer sentiment, Delta Air Lines sends an email to

customers immediately following a flight. Among other questions, Delta asks:

How likely are you to recommend Delta Air Lines to others?

The possible responses are:

Definitely Will Probably Will May or May Not Probably Will Not Definitely Will Not

❍ ❍ ❍ ❍ ❍

Use this information to answer the following questions. LO 2

• Are the data collected by Delta in this example quantitative or categorical?
• What measurement scale is used?

Solutions:

• Because there are five choices, the response is a categorical response.
• The five responses are the labels for the customer responses. A nominal scale is being used.
• Readership Poll. The Tennessean, an online newspaper located in Nashville, Tennessee,

conducts a daily poll to obtain reader opinions on a variety of current issues. In a recent poll, 762 readers responded to the following question: “If a constitutional amendment to ban a state

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