Statistics for Business and Economics这本书第八版的答案,欢迎下载
PrefaceThe purpose of Statistics for Business and Economics is to provide students, primarily inthe fields of business administration and economics, with a sound conceptual introductionto the field of statistics and its many applications. The text is applications-oriented and hasbeen written with the needs of the nonmathematician in mindThe solutions manual furnishes assistance by identifying learning objectives and providingdctailed solutions for all cxcrciscs in thc textAcknowledgementsWe would like to provide special recognition to Catherine J Williams for her efforts inpreparing the solutions marDavid R AndersonDennis j sThomas williamsChapter 1Data and statisticsLearning ObjectiveObtain an appreciation for the breadth of statistical applications in business and economicsUnderstand the meaning of the terms elements, variables, and observations as they are used instatisticsObtain an understanding of the difference between qualitative, quantitative, crossectional and timeseries dataLearn about the sources of data for statistical analysis both internal and external to the firm45678Be aware of how errors can arise in dataKnow the meaning of descriptive statistics and statistical inferenceBe able to distinguish between a population and a sampleUnderstand the role a sample plays in making statistical inferences about the populationSolutionsStatistics can be referred to as numerical facts. In a broader sense statistics is the field of studydealing with the collection, analysis, presentation and interpretation of dataCountry and room rate are qualitative variables; number of rooms and the overall score arequantitative variablesd. Country is nominal; room rate is ordinal; number of rooms and overall score are ratio3. a. Average number of rooms=808/9=89.78 or approximately 90 roomsb. 2 of9 are located in England; approximately 22%c. 4 of9 have a room rate of Ss; approximately 44%b. Fortune 500 largest U.S. industrial corporationsc. Average revenue=$142, 275.9/10=S14, 227.59 milliond. Using the sample average, statistical inference would let us estimate the average revenue for thepopulation of 500 corporations as $14, 227. 59 million5.a.3b. Industry code is qualitative; revenues and profit are quantitativeC. Average profit= 10, 652.1710-$1065.21 milliond. 8 of 10 had a profit over $100 million; 80e. I of i0 had an industry code of 3: 10%Questions a,c, and d are quantitativeQuestions b and e are qualitative7. a. The data are numeric and the variable is qualitativeomina2,013b. Qualitativec. Percentages since we have qualitative datad.(0.28)(2013)=563.64 Must have been563or5649. a. Qualitativeb.30of71;42.3%Quantitative: ratiob. Qualitative; nominalc. Qualitative(Note: Rank is a numeric label that identifies the position of a student in the class. Rankdoes not indicate how much or how many and is not quantitative); ordinald. Qualitative; nominale. Quantitative ratioII. a. Quantitative; ratiob. Qualitative, ordinalc. Qualitative; ordinal (assuming employees can be ranked by classification)d. Quantitative: ratioe. Qualitative; nominal12. a. The population is all visitors coming to the state of Hawaiib. Since airline flights carry the vast majority of visitors to the state, the use of questionnaires forpassengers during incoming nights is a good way Lo reach this population. The questionnaireactually appears on the back of a mandatory plants and animals declaration form that passengersmust complele during the incoming night. A large percentage of passengers complete the visitorInformation questionnaire.c. Questions I and 4 provide quantitative data indicating the number of visits and the number of days inHawaii. Questions 2 and 3 provide qualitative data indicating the categories of reason for the tripb. Time series with 7 observationsC. Number of riverboat casinosd. Time series shows a rapid increase; an increase would be expected in 1998, but it appears that theate of increase is slowingb. All foables are quantitative.c. Timedata [or 1993 to 1996Crossectional data. It is based on the 1996 performance data that was available April 1997We would like to see data from product taste tests and test marketing the product.b. Such data would be obtained from specially designed statistical studies17. Internal data on salaries of other employees can be obtained from the personnel departmentExternal data might be obtained from the Department of Labor or industry associations18. a.(48/120)100%=40% in the sample died from some form of heart disease. This can be used as anestimate of the percentage of all males 60 or older who die of heart diseaseb. The data on cause of death is qualitative19. a. All subscribers of business Week at the time the 1996 survey was conductedb. Ouantitativec. Qualitative(yes or no)d. Crossectional -1996 was the time of the surveye. Using the sample results, we could infer or estimate 59%o of the population of subscribers have anannual income of $75,000 or more and 50%o of the population of subscribers have an AmericanExpress credit card20. a. 56% of market belonged to A C. nielsen$387, 325 is the average amount spent per categorb.3.73C.$387.32521. a. The two populations are the population of women whose mothers took the drug des duringpregnancy and the population of women whose mothers did not take the drug des during pregnancyb. It was a surveyc. 63/.980=15.8 women out of each 1000 developed tissue abnormalitiesd. The article reported twice as many abnormalities in the women whose mothers had taken DESduring pregnancy. Thus, a rough estimate would be 15.8/2=7.9 abnormalities per 1000 womenwhose mothers had not taken deS during pregnancye. In many situations, disease occurrences are rare and affect only a small portion of the populationLarge samples are needed to collect data on a reasonable number of cases where the disease exists22. a. All adult viewers reached by the Denver, Colorado television stationb. The viewers contacted in the telephone survey.c. A sample. It would clearly be too costly and lime consuming to try to contact all viewers23. a. Percent of television sets that were tuned to a particular television show and/ or total viewingaudienceb. All television sets in the United States which are available for the viewing audience. Note this wouldnot include television sets in store displaysc. A portion of these television sets. Generally. individual households would be contacted to determinewhich programs were being viewedd. The cancellation of programs, the scheduling of programs, and advertising cost rates24. a. This is a statistically correct descriptive statistic for the sample.b. An incorrect generalization since the data was not collected for the entire populationC. An acceptable statistical inference based on the use of the word estimated. While this statement is true for the sample, it is not a justifiable conclusion for the entire populatione. This statement is not statistically supportable. While it is true for the particular sample observed, it isentirely possible and even very likely that at least some students will be outside the 65 to 90 range ogradesChapter 2Descriptive Statistics: Tabular andGraphical MethodsLearning ObjectivesLearn how to construct and interpret summarization procedures for qualitative data such asfrequency and relative frequency distributions bar graphs and pie chartsLearn how to construct and interpret tabular summarization procedures for quantitative data such as:frequency and relative frequency distributions, cumulative frequency and cumulative relativefrequency distributiLearn how to construct a dot plot, a histogram, and an ogive as graphical summaries of quantitativeBe able to use and interpret the exploratory data analysis technique of a stem-and-leaf displayLearn how to construct and interpret cross tabulations and scatter diagrams of bivariate dataSolutions:frequencyRelative Frequency60/120=0.5024/120=0.2036/120=0.301-(.22+.18+.40)=.20b.20(200)=40Percent F22(200)=4418(200)=340(200)=8020(00)=40Total3.a.360°x58/120=174b.360°x42/120=12616.7%48.3%No Opinionsponse4. a. The data are qualitativeTV ShowFrequency FrequencyMillionaireFrasierCharmedTotal ...展开详情
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Statistics for Business and Economics 13th edition
2018-08-30Statistics for Business and Economics 13th edition
Statistics for business and economics: Chapter 2 7712018-08-05Using Excel for Tabular and Graphical Presentations1、Frequency Distribution and Bar Chart for Categorical Data 如下图,左边为原始数据,表示四个品牌饮料被购买的情况,我们需要统计四个品牌分别被购买的次数,并且画出条形图。 如上图右边所示,在C1:D1单元格输入 soft dri...Linux学习手册大全 138902021-07-17、Linux大全1、虚拟机安装2、虚拟机网络连接方式3、安装vmtools4、虚拟机目录4.1、目录含义4.2、Linux颜色含义5、远程登录软件6、编辑命令7、用户管理8、CentOS7找回root密码9、文件目录指令pwd指令ls指令cd指令mkdir指令rmdir指令touch指令cp指令rm指令mv指令cat指令more指令less指令echo指令head指令tail指令指令 和指令 ln指令history指令10、日期指令11、查找指令1、find指令2、locate指令3、从零开始学scrapy网络爬虫
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