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1、Chap 1-1Chapter 1Introduction Statistics For Managers Using Microsoft Excel6th EditionChap 1-2Learning ObjectivesIn this chapter you learn:nWhy learn statisticsnHow statistics is used in businessnBasic vocabulary of statisticsChap 1-3Why learn statisticsStatistics is concerned with: nProcessing and
2、analyzing datanCollecting, presenting, and transforming data to assist decision makersStatistics in BusinessSome important specific uses:nTo summarize business datanTo draw conclusions from those datanTo make reliable forecasts about business activitiesnTo improve business processesChap 1-4Two Branc
3、hes of StatisticsnDescriptive statisticsnCollecting, summarizing, and presenting datanInferential statisticsnDrawing conclusions about a population based only on sample dataChap 1-5Chap 1-6Descriptive StatisticsnCollect datane.g., SurveynPresent datane.g., Tables and graphsnCharacterize datane.g., S
4、ample mean = Chap 1-7Inferential StatisticsnEstimationne.g., Estimate the population mean weight using the sample mean weightnHypothesis testingne.g., Test the claim that the population mean weight is 120 poundsDrawing conclusions about a population based on sample results.Four Important UsesnTo vis
5、ualize and summarize your datanTo reach conclusions about a large group based on data collected from a small groupnMaking reliable forecastsnImproving business processesChap 1-8Basic Vocabulary of StatisticsSeven TermsnVariablenDatanOperational definition nPopulationnSamplenParameternStatistic (sing
6、ular)Chap 1-9Key DefinitionsnA variable is a characteristic of an item or individualnData are the different values associated with a variablenVariable values are meaningless unless their corresponding variables have operational definitions. These definitions are universally accepted meanings that ar
7、e clear to all associated with an analysis Chap 1-10Chap 1-11Key DefinitionsnA population (universe) is the collection of all members of a groupnA sample is a portion of the population selected for analysisnA parameter is a numerical measure that describes a characteristic of a populationnA statisti
8、c is a numerical measure that describes a characteristic of a sampleChap 1-12Population vs. Sample a b c d ef gh i jk l m n o p q rs t u v w x y zPopulationSample b c g i n o r u y Measures used to describe a population are called parametersMeasures computed from sample data are called statisticsChap 1-13Chapter SummarynReviewed basic concepts of statistics:Variable vs. DataPopulation vs. SampleParameter vs. StatisticnDefined descriptive vs. inferential statistics
