Test Bank for Business Statistics: A First Course, 3rd Edition

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1-1Chapter 1: Data and Decisions– Quiz AName_________________________1.1.1 Identify various aspects of studies and experiments and/or classify variables.1. Viamedia, the cable industry's leading independent cable rep firm and provider ofonline advertising services, sponsored an online survey in June, 2013 to understandtelevision viewing habits. The survey was given to 2,029 American adults age 18 andolder, of whom 1,958 watch television programming. Of interest was how Americanswatched television –72% watch cable TV while 33% watch on a device (tablet,smartphone, computer). Describe the W’s for the information given.•Who:•What:•When:•Where:•How:•Why:1.2.2 Identify various aspects of studies and experiments and/or classify variables.2. The following tables display some of the demographic data collected in a recent(2012) Nielsen Global Survey analyzing Asian American purchasing behaviors andtelevision viewing patterns. List the variables in the data set. Indicate whether eachvariable is categorical or quantitative. If the variable is quantitative, give the units.AgeDistribution% TotalU.S.Households% Asian-AmericanHouseholds0–913%12%10–1711%10%18–2410%10%25–3413%16%45–5414%14%55–7420%14%75+6%4%IncomeRanges% TotalU.S.Households% Asian-AmericanHouseholds< $25,00024%20%$25,000–$34,99911%8%$35,000–$49,99916%13%$50,000–$74,99920%18%$75,000–$99,99912%14%$100,000+18%29%Compositionof Asian-Americans%CompositionAsian-Indian19%Vietnamese11%Chinese23%Korean10%Filipino17%Japanese5%Other Asian15%

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1-2Chapter 1 Data and Decisions1.2.1 Identify various aspects of studies and experiments and/or classify variables.3. In addition to the variables listed above, data were also collected on the variableslisted below. Indicate whether each is nominal or ordinal.•Region of U.S.(NE, NW, MW, SW, SE)•Education(Less than High School, High School, Some College, College +)•Marital Status(Single, Widowed, Divorced, Married)1.2.3 Identify various aspects of studies and experiments and/or classify variables.4. For each of the following, indicate whether the data are cross-sectional or time series:•Monthly spending on household goods•Change in population for 5 consecutive years•Percentage of adults who bank online•Composition of types of Asian American families in the most populated U.S.cities.•Monthly demand for a technology item•Percentage of adults who purchase goods online

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Quiz A1-3Chapter 1: Data and Decisions – Quiz A – Key1.Viamedia, the cable industry's leading independent cable rep firm and provider ofonline advertising services, sponsored an online survey in June, 2013 tounderstand television viewing habits. The survey was given to 2,029 Americanadults age 18 and older, of whom 1,958 watch television programming. Ofinterest was how Americans watched television –72% watch cable TV while 33%watch on a device (tablet, smartphone, computer). Describe the W’s for theinformation given.•Who:American adults aged 18 and older•What:Television viewing•When:June 2013•Where:United States•How:Online survey•Why:to analyze how Americans watch television

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1-4Chapter 1 Data and Decisions2. The following tables display some of the demographic data collected in a recent(2012) Nielsen Global Survey analyzing Asian American purchasing behaviors andtelevision viewing patterns. List the variables in the data set. Indicate whether eachvariable is categorical or quantitative. If the variable is quantitative, give the units.Categorical: Household Income Ranges, Age Distribution, Types of ExpenditureQuantitative: % Total Household, % Asian-American Households, % Age Distribution-Total U.S. and Asian-American, Expenditures of Asian-Americans ($),Expenditures ofTotal U.S. Market ($)AgeDistribution% TotalU.S.Households% Asian-AmericanHouseholds0–913%12%10–1711%10%18–2410%10%25–3413%16%45–5414%14%55–7420%14%75+6%4%HouseholdIncomeRanges% TotalU.S.Households% Asian-AmericanHouseholds< $25,00024%20%$25,000–$34,99911%8%$35,000–$49,99916%13%$50,000–$74,99920%18%$75,000–$99,99912%14%$100,000+18%29%Types ofExpenditureAsian-AmericansTotal U.S.MarketHousing$20,800$16,900Transportation$10,100$9,000Food$8,000$6,600PersonalInsurance andFood$7,800$5,600Apparel$2,400$1,700

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Quiz A1-53. In addition to the variables listed above, data were also collected on the variableslisted below. Indicate whether each is nominal or ordinal.•Region(NE, NW, MW, SW, SE)Nominal•Education(Less than High School, High School, Some College, College +)Ordinal•Marital Status(Single, Widowed, Divorced, Married)Nominal4. For each of the following, indicate whether the data are cross-sectional or time series:•Monthly spending on household goodsTime Series•Change in population for 5 consecutive yearsTime Series•Composition of types of Asian American families in the most populated U.S.cities.Cross-Sectional•Monthly demand for a technology itemTime Series•Percentage of adults who purchase goods onlineCross-Sectional

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1-6Chapter 1 Data and DecisionsChapter 1: Data and Decisions – Quiz BName_________________________1.1.1 Identify various aspects of studies and experiments and/or classify variables.1.Consumer Reports Healthroutinely compares drugs in terms of effectiveness andsafety. In summer 2008 they reviewed drugs used to treat arthritis. Information wasreported on convenience of use (how many pills required each day), possible side effects(e.g., dizziness, stomach upset), cost, and ratings of effectiveness in relieving symptoms(very effective, somewhat effective, not effective). Describe the W’s for the informationgiven.•Who:•What:•When:•Where:•How:•Why:1.2.1 Identify various aspects of studies and experiments and/or classify variables.2. List the variables reported in theConsumer Reports Healtharticle on drugs used totreat arthritis. If the variable is quantitative, give the units. If the variable is categorical,indicate whether it is nominal or ordinal.1.2.2 Identify various aspects of studies and experiments and/or classify variables.3. The Human Resources Department of a large corporation maintains records on itsemployees. The table displays some of these data. List the variables in the data set.Indicate whether each variable is categorical or quantitative. If the variable isquantitative, give the units. If the variable is categorical, indicate whether it is nominal orordinal.AgeEmploymentCategoryEducationParticipates inWellness Program?Paycheck BenefitDeductions32ClericalHigh SchoolYes$25052ProfessionalCollegeNo$12060ProfessionalJunior CollegeYes$028ClericalHigh SchoolNo$1201.2.3 Identify various aspects of studies and experiments and/or classify variables.4. For each of the following, indicate whether the data are cross-sectional or time series:•Company quarterly profits•Percentage of American adults who work full time•Historical closing stock prices

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Quiz B1-7Chapter 1: Data and Decisions – Quiz B – Key1.Consumer Reports Healthroutinely compares drugs in terms of effectiveness andsafety. In summer 2008 they reviewed drugs used to treat arthritis. Information wasreported on convenience of use (how many pills required each day), possible side effects(e.g., dizziness, stomach upset), cost, and ratings of effectiveness in relieving symptoms(very effective, somewhat effective, not effective). Describe the W’s for the informationgiven.•Who:drugs to treat arthritis currently on the market•What:convenience of use, side effects, cost, effectiveness ratings•When:summer 2008•Where:not specified, probably United States•How:testing on drugs•Why:information for potential consumers/patients2. List the variables reported in theConsumer Reports Healtharticle on drugs used totreat arthritis. If the variable is quantitative, give the units. If the variable is categorical,indicate whether it is nominal or ordinal.Categorical: Side effect (nominal), effectiveness rating (ordinal)Quantitative: Convenience of use (number of pills), Cost ($)3. The Human Resources Department of a large corporation maintains records on itsemployees. The table displays some of these data. List the variables in the data set.Indicate whether each variable is categorical or quantitative. If the variable isquantitative, give the units. If the variable is categorical, indicate whether it is nominal orordinal.

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1-8Chapter 1 Data and DecisionsAgeEmploymentCategoryEducationParticipates inWellness Program?Paycheck BenefitDeductions32ClericalHigh SchoolYes$25052ProfessionalCollegeNo$12060ProfessionalJunior CollegeYes$028ClericalHigh SchoolNo$120Categorical: Employment Category (nominal), Education (ordinal), Participation inWellness Program? (nominal)Quantitative:Age (years), Paycheck Benefit Deductions ($)4. For each of the following, indicate whether the data are cross-sectional or time series:•Company quarterly profitsTime Series•Percentage of American adults who work full timeCross-Sectional•Historical closing stock pricesTime Series

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Quiz C1-9Chapter 1: Data and Decisions – Quiz CName_________________________1.1.1 Identify various aspects of studies and experiments and/or classify variables.1.Consumer Reports National Research Centerroutinely compares products andservices. A poll of more than 1,800 U.S. residents was conducted shortly after the 2008holiday season. What they found was that fewer people than in the previous year tippedtheir service providers (newspaper carrier, barber, mail carrier, hairdresser, garbagecollector) or the amount that consumers tip for specific services was reduced..Information was reported on the type of service, whether a tip or gift was given, and themedian total value of the tip. Describe the W’s for the information given.•Who:•What:•When:•Where:•How:•Why:1.2.1 Identify various aspects of studies and experiments and/or classify variables.2. List the variables reported in theConsumer Reports Magazinearticle on tipping. Ifthe variable is quantitative, give the units. If the variable is categorical, indicate whetherit is nominal or ordinal.1.2.2 Identify various aspects of studies and experiments and/or classify variables.3. Businesses in a U.S. city were surveyed about information to provide to prospectiveemployees after graduating from business school. The table displays some of these data.List the variables in the data set. Indicate whether each variable is categorical orquantitative. If the variable is quantitative, give the units. If the variable is categorical,indicate whether it is nominal or ordinal.EmploymentCategoryRequire an MBADegree?Prefer Graduateswith WorkExperience?Median Salary ofNew GraduatesSalesNoNo$35,000ManagementYesYes$47,000AccountingNoYes$52,000AdvertisingNoNo$45,0001.2.3 Identify various aspects of studies and experiments and/or classify variables.4. For each of the following, indicate whether the data are cross-sectional or time series:•Dow Jones Index•Eating habits by age group•Attitudes toward abortion over past 10 years•Voting behavior data for a particular neighborhood

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1-10Chapter 1 Data and DecisionsChapter 1: Data and Decisions – Quiz C – Key1.Consumer Reports National Research Centerroutinely compares products andservices. A poll of more than 1,800 U.S. residents was conducted shortly after the 2008holiday season. What they found was that fewer people tipped their service providers(newspaper carrier, barber, mail carrier, hairdresser, garbage collector) than in theprevious year or the amount that consumers tip for specific services was reduced.Information was reported on the type of service, whether a tip or gift was given, the levelof tipping, and the median total value of the tip. Describe the W’s for the informationgiven.•Who:U.S. residents, most likely adults although not specified•What:Amount of tipping and type of tipping for service providers during the holiday season forthis year and the previous year•When:shortly after the holiday season 2008•Where:United States•How:A poll – not specified what type•Why:investigate consumer behavior in tipping service providers2. List the variables reported in theConsumer Reports Magazinearticle on tipping. Ifthe variable is quantitative, give the units. If the variable is categorical, indicate whetherit is nominal or ordinal.Categorical: Whether or not someone tipped this year and/or previous year (nominal),type of tipping–gift or money (nominal), service provider who was tipped (nominal),level of tipping–low, medium, high (ordinal)Quantitative: Median value of tip ($),

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Quiz C1-113. Businesses in a U.S. city were surveyed about information to provide to prospectiveemployees after graduating from business school. The table displays some of these data.List the variables in the data set. Indicate whether each variable is categorical orquantitative. If the variable is quantitative, give the units. If the variable is categorical,indicate whether it is nominal or ordinal.EmploymentCategoryRequire an MBADegree?Level of WorkExperiencePreferred?Median Salary ofNew GraduatesSalesNoNone$35,000ManagementYesExtensive$47,000AccountingNoModerate$52,000AdvertisingNoNone$45,000Categorical: Employment Category (nominal), Require an MBA Degree? (nominal),Level of Work Experience Preferred? (ordinal)Quantitative: Median Salary of New Graduates ($)4. For each of the following, indicate whether the data are cross-sectional or time series:•Dow Jones IndexTime Series•Eating habits by age groupCross-Sectional•Attitudes toward abortion over past 10 yearsTime Series•Voting behavior data for a particular neighborhoodCross-Sectional

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1-12Chapter 1 Data and DecisionsChapter 1: Data and Decisions – Quiz D – Multiple ChoiceName________________________1.1.1 Identify various aspects of studies and experiments and/or classify variables.1. In the fall of 2007, thePew Internet & Life Projectconducted telephone interviewswith a sample of American adults aged 18 and older about online shopping. Americanadults aged 18 and older constitute the ______ of the study.A. WhoB. WhatC. WhenD. WhereE. How1.2.1 Identify various aspects of studies and experiments and/or classify variables.2. A few of the variables for which data were collected in thePew Internet & LifeProjectstudy about online shopping include age, gender, income, and number of hoursspent shopping online per month. Which of the variables is categorical?A. AgeB. GenderC. IncomeD. Number of hours spent shopping onlineE. None1.2.1 Identify various aspects of studies and experiments and/or classify variables.3. ThePew Internet & Life Projectstudy about online shopping asked respondents toindicate their education level on the following scale:Less than High School, HighSchool, Some College, College +.Which of the following statements is (are) true?A. Education level is a categorical variable.B. Education level is nominal scaled.C. Education level is ordinal scaled.D. Both A and BE. Both A and C

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Quiz D1-131.1.1 Identify various aspects of studies and experiments and/or classify variables.4.Consumer Reports Healthroutinely compares drugs in terms of effectiveness andsafety. In summer 2008 they reviewed drugs used to treat arthritis. Among theinformation reported was convenience of use (how many pills required each day) andpossible side effects (e.g., dizziness, stomach upset). Convenience of use and possibleside effects constitute the ________ of the study.A. WhoB. WhatC. WhenD. WhereE. How1.1.1 Identify various aspects of studies and experiments and/or classify variables.5. What is the “Who” in aConsumer Reports Healthstudy on the effectiveness andsafety of drugs used to treat arthritis?A. drugs to treat arthritis currently on the marketB. convenience of use and possible side effectsC. summer 2008D. the United StatesE. testing on drugs1.2.1 Identify various aspects of studies and experiments and/or classify variables.6. AConsumer Reports Healthstudy on the effectiveness and safety of arthritis drugscollected data on possible side effects. This is what kind of variable?A. QuantitativeB. CategoricalC. NominalD. Both A and CE. Both B and C1.2.1 Identify various aspects of studies and experiments and/or classify variables.7. AConsumer Reports Healthstudy on arthritis drugs takes into consideration cost.Cost isA. is a nominal variable.B. is a categorical variable.C. is a quantitative variable.D. is an ordinal variable.E. is an irrelevant variable.

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1-14Chapter 1 Data and Decisions1.2.1 Identify various aspects of studies and experiments and/or classify variables.8. The Human Resources Department of a large corporation maintains records on itsemployees. Data are maintained of the following variables:Age, Employment Category,Education, Whether or not the employee participates in a wellness program, andPaycheck benefit deductions.Which of these variables are categorical?A.Age, Employment Category, andEducationB.Employment Category, Education, andWhether or not the employee participatesina wellness programC.Education, Whether or not the employee participates in a wellness program, andPaycheck benefit deductionsD. All of the variablesE. None of the variables1.2.3 Identify various aspects of studies and experiments and/or classify variables.9. Which of the following is (are) based on cross sectional data?A. Company quarterly profitsB. Percentage of American adults who work full timeC. Historical closing stock pricesD. All of the aboveE. None of the above.1.2.3 Identify various aspects of studies and experiments and/or classify variables.10. Which of the following is (are) time series data?A. Weekly receipts at a clothing boutiqueB. Monthly demand for an automotive partC. Quarterly sales of automobilesD. All of the aboveE. None of the above

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Quiz D1-15Chapter 1: Data and Decisions – Quiz D – Key1. A2. B3. E4. B5. A6. E7. C8. B9. B10. D

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1-16Chapter 1 Data and DecisionsChapter 1: Data and Decisions – Quiz E – Multiple ChoiceName___________________1.1.1 Identify various aspects of studies and experiments and/or classify variables.1. A university is interested in gauging student satisfaction in its online MBA program.A survey is designed and administered via the Internet to a sample of students currentlyactive in the program. Which of the following would best describe the cases?A. ParticipantsB. RespondentsC. Experimental UnitsD. SubjectsE. Variables1.2.1 Identify various aspects of studies and experiments and/or classify variables.2. In a survey undertaken by a university to gauge student satisfaction in its online MBAprogram, one question asked students to indicate their employment status (unemployed,employed part-time, employed full-time). Which of the following is true?A. This variable is categorical.B. This variable is quantitative.C. This is an identifier variable.D. Both A and C.E.Both B and C.1.2.1 Identify various aspects of studies and experiments and/or classify variables.3. In a survey undertaken by a university to gauge student satisfaction in its online MBAprogram, one question asked students to indicate the number of credits they hadtransferred into the program. Which of the following is true?A. This variable is categorical.B. This variable is transactional.C. This variable is quantitative.D. This is an identifier variable.E. This variable is nominal.

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Quiz E1-171.1.1 Identify various aspects of studies and experiments and/or classify variables.4. Researchers in e-commerce design an experiment to determine what factors are mostimportant to online consumers when completing a transaction via the Internet.Individuals perform tasks on a set of Web sites and record their impressions aboutvarious attributes. Which of the following would best describe the cases?A. ParticipantsB. RespondentsC. Experimental UnitsD. TransactionsE. Variables1.2.1 Identify various aspects of studies and experiments and/or classify variables.5. A popular travel magazine regularly reviews hotels worldwide. In a recent issue, itfocused on hotels in Hawaii. Among the variables for which it provided data waswhether or not the hotel included a spa. This is aA. quantitative variable.B. identifier variable.C. ordinal variable.D. categorical variable.E. transactional variable.1.2.1 Identify various aspects of studies and experiments and/or classify variables.6. A popular travel magazine regularly reviews hotels worldwide. In a recent issue, itfocused on hotels in Hawaii. Among the variables for which it provided data was theprice range for rooms with an ocean view. Which of the following statements is true?A. These data are transactional.B. This variable is quantitative and the units are $.C. This variable is quantitative and the units are number of rooms.D. This variable is qualitative and ordinal.E. These data are time series.1.2.1 Identify various aspects of studies and experiments and/or classify variables.7. A mid-priced chain of hotels,Hometown Suites, strives to make its guests “feel athome” by providing amenities such as microwaves in every room. Comment cards areused to get feedback on the importance of such amenities by asking guests to rate themusing the scale: ___ Essential___ Important___ Not Important.These data areA. qualitative.B. nominal.C. ordinal.D. both A and B.E. both A and C.

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1-18Chapter 1 Data and Decisions1.3.1 Identify various aspects of studies and experiments and/or classify variables.8. A locally owned spa,Alexander’s, is interested in adding a tea room that not onlyoffers specialty teas but an organic lunch menu. In order to determine how many of itsregular customers would be interested in such an addition,Alexander’ssent out a short e-mail questionnaire. The source of these data isA. the Internet.B. transactional.C. a designed survey.D. a designed experiment.E. secondary.1.2.3 Identify various aspects of studies and experiments and/or classify variables.9. A locally owned spa,Alexander’s, is interested in adding a tea room that not onlyoffers specialty teas but an organic lunch menu. In order to determine how many of itsregular customers would be interested in such an addition,Alexander’ssent out a short e-mail questionnaire. One question asked its customers to indicate how much they spendmonthly on all natural, organic products. These data areA. cross-sectional.B. time series.C. categorical.D. transactional.E.experimental.1.2.3 Identify various aspects of studies and experiments and/or classify variables.10. A mid-priced chain of hotels,Hometown Suites, collects data on monthly occupancyrates for forecasting and planning purposes. These data areA. cross-sectional.B. time series.C. categorical.D. transactional.E.experimental.

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Quiz E1-19Chapter 1: Data and Decisions – Quiz E – Key1. B2. A3. C4. A5. D6. B7. E8. C9. A10. B

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1-20Chapter 1 Data and DecisionsChapter 1: Data and Decisions – Quiz F– Multiple ChoiceName___________________1.1.1 Identify various aspects of studies and experiments and/or classify variables.1. In June, 2013, Viamedia sponsored an online survey to sample a group of Americanadults aged 18 and older about watching television. American adults aged 18 and olderconstitute the ______ of the study.A. WhoB. WhatC. WhenD. WhereE. How1.2.1 Identify various aspects of studies and experiments and/or classify variables.2. A few of the variables for which data were collected in the Viamedia survey abouttelevision viewing include age, gender, income, and type of device used to watchtelevision. Which of the variables is categorical?A. AgeB. Type of device used to watch televisionC. IncomeD. AllE. None1.2.1 Identify various aspects of studies and experiments and/or classify variables.3. The data collected in a recent (2012) Nielsen Global Survey analyzed Asian Americandemographics. Which of the following statements is (are) true?A. Education level is a categorical variable.B. Education level is nominal scaled.C. Education level is ordinal scaled.D. Both A and BE. Both A and C1.1.1 Identify various aspects of studies and experiments and/or classify variables.4.Businessesare interested in the work experience of recent graduates from a localbusiness school. Whether or not the graduates have work experience constitutes the________ of the study.A. WhoB. WhatC. WhenD. WhereE. How

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Quiz F1-211.1.1 Identify various aspects of studies and experiments and/or classify variables.5. What is the “What” in aConsumer Reports Tippingstudy on the level of tippingduring the current holiday season compared to the last holiday season?A. whether or not tippedB. amount of tip compared to last yearC. the type of tipD. the United States1.2.1 Identify various aspects of studies and experiments and/or classify variables.6. AConsumer Reportssurvey on the level of tipping for service providers. This is whatkind of variable?A. QuantitativeB. OrdinalC. NominalD. Both A and CE. Both B and C1.2.1 Identify various aspects of studies and experiments and/or classify variables.7. AConsumer Reportsstudy on tipping takes into consideration median amount oftipping for service providers. Tipping isA. is a nominal variable.B. is a categorical variable.C. is a quantitative variable.D. is an ordinal variable.E. is an irrelevant variable.1.2.1 Identify various aspects of studies and experiments and/or classify variables.8. The Human Resources Department of a large corporation maintains records on itsemployees. Data are maintained of the following variables:Age, Employment Category,Education,andWhether or not the employee has an advanced degree.Which of thesevariables are categorical?A.Age, Employment Category, andEducationB.Employment Category and EducationC.Education and Whether or not the employee has an advanced degreeD. All of the variablesE. None of the variables

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1-22Chapter 1 Data and Decisions1.2.3 Identify various aspects of studies and experiments and/or classify variables.9. Which of the following is (are) based on cross sectional data?A. Company quarterly profitsB. Percentage of American adults who work full timeC. Dow Jones IndexD. All of the aboveE. None of the above.1.2.3 Identify various aspects of studies and experiments and/or classify variables.10. Which of the following is (are) time series data?A. Monthly receipts at an apparel shopB. Monthly demand for a technology itemC. Dow Jones IndexD. All of the aboveE. None of the above

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Quiz F1-23Chapter 1: Data and Decisions – Quiz F – Key1. A2. B3. E4. B5. B6. B7. C8. B9. B10. D

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2-1Chapter 2: Displaying and Describing Categorical Data – Quiz AName_____________________________________A large national retailer of electronics conducted a survey to determine consumerpreferences for various brands of point and shoot digital cameras. The table summarizesresponses by brand and gender.2.1.3 Create and use frequency and relative frequency distributions and their displays.1. Identify the variables and tell whether each is categorical or quantitative.2.1.3 Create and use frequency and relative frequency distributions and their displays.2. Find each of the following percentages.a. What percent of the responses were males who prefer Nikon?b. What percent of the male responses prefer Olympus?c. What percent of the consumers who choose Nikon were females?2.3.4 Determine if displays of data are appropriate.3. What is the marginal distribution of brands?2.2.4 Determine if displays of data are appropriate.4. Prepare an appropriate chart to display the marginal distribution of brands.2.3.4 Determine if displays of data are appropriate.5. Write a sentence or two about the conditional relative frequency distribution of thebrands among female respondents.FemaleMaleTotalCannon Power Shot7359132Nikon Cool Pix494796Sony Cyber Shot583391Panasonic Lumix353065Fujifilm Finepix452873Olympus S/V374178Other Brands8667153Total383305688

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2-2Chapter 2Displaying and Describing Categorical Data2.2.1 Determine if displays of data are appropriate.6. Consider the following side by side bar chart for the data above:Does the chart indicate that brand preference is independent of gender? Explain.

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Quiz A2-3Chapter 2: Displaying and Describing Categorical Data – Quiz A – KeyA large national retailer of electronics conducted a survey to determine consumerpreferences for various brands of digital cameras. The table summarizes responses bybrand and gender.1. Identify the variables and tell whether each is categorical or quantitative.Gender and Brand; both categorical.2. Find each of the following percentages.a. What percent of the responses were males who prefer Nikon?6.8% (47/688)b. What percent of the male responses prefer Olympus?13.4% (41/305)c. What percent of the consumers who choose Nikon were females?51.0% (49/96)3. What is the marginal distribution of brands?132 for Cannon Power Shot, 96 for Nikon Cool Pix, 91 for Sony Cyber Shot, 65 forPanasonic Lumix, 73 for Fujifilm Finepix, 78 for Olympus S/V and 153 for other brands.4. Prepare an appropriate chart to display the marginal distribution of brands.Either a bar chart (shown below) or a pie chart is appropriate.FemaleMaleTotalCannon Power Shot7359132Nikon Cool Pix494796Sony Cyber Shot583391Panasonic Lumix353065Fujifilm Finepix452873Olympus S/V374178Other Brands8667153Total383305688

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2-4Chapter 2Displaying and Describing Categorical Data5. Write a sentence or two about the conditional relative frequency distribution of thebrands among female respondents.Among females, 19.1% prefer Cannon, 12.8% prefer Nikon, 15.1% prefer Sony, 9.1%prefer Panasonic, 11.7% prefer Fujifilm, and 9.7% prefer Olympus. The remaining22.5% of females preferred other brands.6. Consider the following side by side bar chart for the data above:Does the chart indicate that brand preference is independent of gender? Explain.Brand preference appears to be independent of gender for about half of the brands. Theother half of the brand preferences seem to have preference based on gender. These dataprovide little evidence of a difference in digital camera choice based on gender.

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Quiz B2-5Chapter 2: Displaying and Describing Categorical Data – Quiz BName_____________________________________A full service brokerage firm gathered information on how their clients were investingfor retirement. Based on age, clients were categorized according to where the largestpercentage of their retirement portfolio was invested. The table below summarized thedata.2.1.3 Create and use frequency and relative frequency distributions and their displays.1. Identify the variables and tell whether each is categorical or quantitative.2.1.3 Create and use frequency and relative frequency distributions and their displays.2. Find each of the following percentages.a. What percent of the clients are over age 50 who invests in mutual funds?b. What percent of clients over age 50 invest in mutual funds?c. What percent of the mutual fund investors are over age 50?2.3.4 Determine if displays of data are appropriate.3. What is the marginal distribution of age?2.2.4 Determine if displays of data are appropriate.4. Prepare an appropriate chart to display the marginal distribution of age.2.1.3 Create and use frequency and relative frequency distributions and their displays.5. Write a sentence or two about the conditional relative frequency distribution of modeof investment for clients age 50 or younger.Age 50 orYoungerOverAge 50TotalMutual Funds303464Stocks374582Bonds192342Total86102188

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2-6Chapter 2Displaying and Describing Categorical Data2.4.3 Create and use frequency and relative frequency distributions and their displays.6. Consider the following side by side bar chart for the data above:Does the chart indicate that mode of investment is independent of age? Explain.2.5.4 Create and use frequency and relative frequency distributions and their displays.7. A newspaper examined the town's two hospitals and found that over the last sixmonths at Mercy Hospital 79% of the patients survived while at County Hospital 90%survived. The table below summarizes the findings.LivedDiedTotal% who livedMercy Hospital790210100079.0%City Hospital900100100090.0%On closer investigation, it was observed that there was a difference in survival betweenpatients who were admitted in poor condition or worse compared with patients admittedin fair condition or better. The following tables were created:Patients admitted in poor condition or worse:LivedDiedTotal% who livedMercy Hospital210200410City Hospital4070110InvestmentBondsStocksMutual FundsOlderYoungerOlderYoungerOlderYounger6050403020100DataPercent within levels of Investment.

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Quiz B2-7Patients admitted in fair condition or better:LivedDiedTotal% who livedMercy Hospital58010590City Hospital86030890a)Fill in the four blanks in the two tables above with percentages.b)Compare the percentages in the first table with those in the next two tables. Doyou observe anything unusual?c)Which hospital would you choose and why?

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