商業(yè)統(tǒng)計(jì)學(xué)英文課件：ch01 Introduction

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 = iXnChap 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

5、visualize 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 (s

6、ingular)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

7、 are 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 stati

8、stic 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 con