General Business 704 Data Analysis for Managers Introduction The Course, Data, and Excel.
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Transcript of General Business 704 Data Analysis for Managers Introduction The Course, Data, and Excel.
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General Business 704General Business 704Data Analysis for Data Analysis for
ManagersManagers
General Business 704General Business 704Data Analysis for Data Analysis for
ManagersManagers
IntroductionIntroduction
The Course, Data, and ExcelThe Course, Data, and Excel
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Instructor/Class InfoInstructor/Class InfoInstructor/Class InfoInstructor/Class Info
Kholid eFendiKholid [email protected]@hotmail.com
Class:Class:http://ins2happy.awardspace.comhttp://ins2happy.awardspace.com
Kholid eFendiKholid [email protected]@hotmail.com
Class:Class:http://ins2happy.awardspace.comhttp://ins2happy.awardspace.com
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Course ObjectivesCourse ObjectivesCourse ObjectivesCourse Objectives
Master key terminology for data analysisMaster key terminology for data analysis Understand key statistical conceptsUnderstand key statistical concepts Master the selection of appropriate Master the selection of appropriate
statistical toolsstatistical tools Master the use of Excel for the Master the use of Excel for the
calculation of statisticscalculation of statistics Master the ability to interpret and explain Master the ability to interpret and explain
the meaning of statistical findingsthe meaning of statistical findings Have funHave fun
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Class MottoClass MottoClass MottoClass Motto
We will learn no statisticWe will learn no statistic
before its timebefore its time
Our focus is on making sense of managerial situations and questions
through the use of statistics
Our focus is on making sense of managerial situations and questions
through the use of statistics
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Course TopicsCourse TopicsCourse TopicsCourse Topics DataData ExcelExcel Presenting & Describing DataPresenting & Describing Data Estimation: Confidence IntervalsEstimation: Confidence Intervals Hypothesis TestingHypothesis Testing Simple Regression & CorrelationSimple Regression & Correlation Multiple RegressionMultiple Regression Bonus Session: Time Series, Bonus Session: Time Series,
Forecasting, & SmoothingForecasting, & Smoothing
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Readings & Class TimeReadings & Class TimeReadings & Class TimeReadings & Class Time Reading AssignmentsReading Assignments
Ch. 4 & 5 review on your ownCh. 4 & 5 review on your own Ch. 10 covered in OIM 768: Quality Mgmt Ch. 1, Ch. 10 covered in OIM 768: Quality Mgmt Ch. 1,
1S, 2, 3, 6, 7, 8, & 9 overview1S, 2, 3, 6, 7, 8, & 9 overview Ch. 11 & 12 covered in depthCh. 11 & 12 covered in depth Ch. 13 for reference purposesCh. 13 for reference purposes
Class TimeClass Time Lecture & DiscussionLecture & Discussion DemonstrationsDemonstrations Application PracticeApplication Practice
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AssignmentsAssignmentsAssignmentsAssignments
HomeworkHomework Demonstrate ability to do requested tasksDemonstrate ability to do requested tasks
Individual & Team CasesIndividual & Team Cases Demonstrate ability to: identify & apply Demonstrate ability to: identify & apply
appropriate tools; & interpret/explain findingsappropriate tools; & interpret/explain findings
Team ProjectTeam Project Demonstrate ability to: develop good questions; Demonstrate ability to: develop good questions;
identify appropriate data; identify & apply identify appropriate data; identify & apply appropriate tools; & interpret/explain findingsappropriate tools; & interpret/explain findings
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ExamsExamsExamsExams
Exam #1Exam #1 Wednesday 9/23Wednesday 9/23 Covers material through Chapter 9Covers material through Chapter 9
Final ExamFinal Exam Wednesday 10/21Wednesday 10/21 Covers all course materialCovers all course material
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GradingGradingGradingGrading
ActivityActivity PointsPointsHomework #1Homework #1 50 50Homework #2Homework #2 50 50Homework #3Homework #3 50 50Individual Case #1Individual Case #1 100 100Individual Case #2Individual Case #2 100 100Team CaseTeam Case 100 100Team ProjectTeam Project 250 250Exam #1Exam #1 100 100Final ExamFinal Exam 200 200
TOTAL POINTSTOTAL POINTS 10001000
ActivityActivity PointsPointsHomework #1Homework #1 50 50Homework #2Homework #2 50 50Homework #3Homework #3 50 50Individual Case #1Individual Case #1 100 100Individual Case #2Individual Case #2 100 100Team CaseTeam Case 100 100Team ProjectTeam Project 250 250Exam #1Exam #1 100 100Final ExamFinal Exam 200 200
TOTAL POINTSTOTAL POINTS 10001000
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Objectives:Objectives:Data & ExcelData & ExcelObjectives:Objectives:
Data & ExcelData & Excel
Define statisticsDefine statistics Distinguish descriptive & inferential Distinguish descriptive & inferential
statisticsstatistics Summarize the sources of dataSummarize the sources of data Describe the types of data & scalesDescribe the types of data & scales Explain the types of samplesExplain the types of samples Describe survey process & errorsDescribe survey process & errors Discuss the use of ExcelDiscuss the use of Excel
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Some Important IssuesSome Important IssuesSome Important IssuesSome Important Issues
Collecting dataCollecting data e.g., Surveye.g., Survey
Presenting dataPresenting data e.g., Charts & e.g., Charts &
tablestables
Characterizing Characterizing datadata e.g., Averagee.g., Average
Data Data AnalysisAnalysis
Decision-Decision-MakingMaking
© 1984-1994 T/Maker Co.
© 1984-1994 T/Maker Co.
Why?Why?
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Application AreasApplication AreasApplication AreasApplication Areas
AccountingAccounting AuditingAuditing CostingCosting
FinanceFinance Financial trendsFinancial trends ForecastingForecasting
ManagementManagement Describe employeesDescribe employees Quality improvementQuality improvement
MarketingMarketing Consumer preferencesConsumer preferences Marketing mix effectsMarketing mix effects
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Statistical MethodsStatistical MethodsStatistical MethodsStatistical Methods
StatisticalMethods
DescriptiveStatistics
InferentialStatistics
StatisticalMethods
DescriptiveStatistics
InferentialStatistics
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Descriptive StatisticsDescriptive StatisticsDescriptive StatisticsDescriptive Statistics
InvolvesInvolves Collecting dataCollecting data Presenting dataPresenting data Characterizing Characterizing
datadata
PurposePurpose Describe dataDescribe data
X = 30.5 SX = 30.5 S22 = 113 = 113
0
25
50
Q1 Q2 Q3 Q4
$
0
25
50
Q1 Q2 Q3 Q4
$
__
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Inferential StatisticsInferential StatisticsInferential StatisticsInferential Statistics
InvolvesInvolves EstimationEstimation Hypothesis Hypothesis
testingtesting
PurposePurpose Make decisions Make decisions
about population about population characteristicscharacteristics
Population?Population?
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Population (universe)Population (universe) All items of interestAll items of interest
SampleSample Portion of populationPortion of population
ParameterParameter Summary measure about populationSummary measure about population
StatisticStatistic Summary measure about sampleSummary measure about sample
Some Key TermsSome Key TermsSome Key TermsSome Key Terms
• PP in in PPopulation opulation & & PParameterarameter
• SS in in SSample ample & & SStatistictatistic
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Why Collect Data?Why Collect Data?Why Collect Data?Why Collect Data?
Obtain input to a research studyObtain input to a research study Measure performanceMeasure performance Assist in formulating decision Assist in formulating decision
alternativesalternatives Satisfy curiositySatisfy curiosity
Knowledge for the sake of knowledgeKnowledge for the sake of knowledge
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Data TypesData TypesData TypesData Types
Data
Numerical(Quantitative)
Categorical(Qualitative)
Discrete Continuous
Data
Numerical(Quantitative)
Categorical(Qualitative)
Discrete Continuous
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Data Type ExamplesData Type ExamplesData Type ExamplesData Type Examples
NumericalNumerical DiscreteDiscrete
To how many magazines do you subscribe To how many magazines do you subscribe currently? ___ (Number)currently? ___ (Number)
Continuous Continuous How tall are you? ___ (Inches)How tall are you? ___ (Inches)
CategoricalCategorical Do you own savings bonds? __ Yes __ NoDo you own savings bonds? __ Yes __ No
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Interval scaleInterval scale Equal intervalsEqual intervals No true 0No true 0 e.g., Degrees Celsiuse.g., Degrees Celsius MeasurementMeasurement
Ratio scaleRatio scale Equal intervalsEqual intervals True 0True 0 Meaningful ratiosMeaningful ratios e.g., Height in inchese.g., Height in inches
How Are Data How Are Data Measured?Measured?
How Are Data How Are Data Measured?Measured?
Nominal scaleNominal scale CategoriesCategories
e.g., Male-femalee.g., Male-female CountCount
Ordinal scaleOrdinal scale CategoriesCategories Ordering impliedOrdering implied
e.g., High-lowe.g., High-low CountCount
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Data SourcesData SourcesData SourcesData Sources
DataSources
Primary Secondary
Experiment Published(& On-Line)
Survey Observation
DataSources
Primary Secondary
Experiment Published(& On-Line)
Survey Observation
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Collect data Collect data (field work)(field work)
Prepare dataPrepare data EditEdit CodeCode
Analyze dataAnalyze data Interpret findingsInterpret findings Report resultsReport results
Define purposeDefine purpose Design Design
questionnairequestionnaire Select sample Select sample
designdesign Sample type Sample type Sample sizeSample size
Basic Survey StepsBasic Survey StepsBasic Survey StepsBasic Survey Steps
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Questionnaire DesignQuestionnaire DesignQuestionnaire DesignQuestionnaire Design
Question contentQuestion content Mode of responseMode of response Question wordingQuestion wording Question sequenceQuestion sequence LayoutLayout Pilot testingPilot testing
© 1984-1994 T/Maker Co.
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Why Sample?Why Sample?Why Sample?Why Sample?
Destruction of test Destruction of test unitsunits Quality controlQuality control
Accurate & Accurate & reliable resultsreliable results
Pragmatic reasonsPragmatic reasons TimeTime CostCost
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Types of SamplesTypes of SamplesTypes of SamplesTypes of Samples
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
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Types of SamplesTypes of SamplesTypes of SamplesTypes of Samples
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
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Simple Simple Random SampleRandom Sample
Simple Simple Random SampleRandom Sample
Each population element Each population element has an has an equal chanceequal chance of of being selectedbeing selected
Selecting 1 subject does Selecting 1 subject does not affect selecting not affect selecting othersothers
May use random number May use random number table, lottery, ‘fish bowl’table, lottery, ‘fish bowl’
© 1984-1994 T/Maker Co.
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Random Number Random Number TableTable
Random Number Random Number TableTable
Column
00000 00001 11111 11111Row 12345 67890 12345 67890
01 49280 88924 35779 00283
02 61870 41657 07468 08612
03 43898 65923 25078 86129
Column
00000 00001 11111 11111Row 12345 67890 12345 67890
01 49280 88924 35779 00283
02 61870 41657 07468 08612
03 43898 65923 25078 86129
OR: Use Excel to generate random numbersOR: Use Excel to generate random numbers
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Types of SamplesTypes of SamplesTypes of SamplesTypes of Samples
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
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Systematic SampleSystematic SampleSystematic SampleSystematic Sample
Every Every kkth element Is th element Is selected after a selected after a random start within random start within the first the first kk elements elements
Skip interval, Skip interval, kk, is, is Population sizePopulation size Sample size Sample size
Used in telephone Used in telephone surveyssurveys © 1984-1994 T/Maker Co.
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Types of SamplesTypes of SamplesTypes of SamplesTypes of Samples
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
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Stratified SampleStratified SampleStratified SampleStratified Sample
Divide population into Divide population into subgroupssubgroups Mutually exclusiveMutually exclusive ExhaustiveExhaustive At least 1 common At least 1 common
characteristic of characteristic of interestinterest
Select simple random Select simple random samples from samples from subgroupssubgroups
All StudentsAll Students
CommuterCommuterss
ResidentsResidents
SampleSample
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Types of SamplesTypes of SamplesTypes of SamplesTypes of Samples
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
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Cluster SampleCluster SampleCluster SampleCluster Sample
Divide population Divide population into clustersinto clusters If managers If managers
are elements then are elements then companies are clusterscompanies are clusters
Select clusters Select clusters randomlyrandomly
Survey all or a random Survey all or a random sample of elements in sample of elements in clustercluster
Companies (Clusters)Companies (Clusters)
SampleSample
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Types of SamplesTypes of SamplesTypes of SamplesTypes of Samples
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
Type ofSample
ProbabilityNon
Probability
SimpleRandom
StratifiedSystematic Cluster
ChunkJudg-ment
Quota
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Nonprobability Nonprobability SamplesSamples
Nonprobability Nonprobability SamplesSamples
JudgmentJudgment Use experience to select sampleUse experience to select sample Example: Test marketsExample: Test markets
QuotaQuota Similar to stratified sampling Similar to stratified sampling
except no random samplingexcept no random sampling
Chunk (convenience)Chunk (convenience) Use elements most availableUse elements most available
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Errors Due to Errors Due to Sampling Sampling
Errors Due to Errors Due to Sampling Sampling
Total Population(Students)
Sample Frame(Students inPhone Book)
Planned Sample(Selected Students)
ActualSample
Coverage (Frame) Error
Sampling Error
Nonresponse &Measurement Error
Total Population(Students)
Sample Frame(Students inPhone Book)
Planned Sample(Selected Students)
ActualSample
Coverage (Frame) Error
Sampling Error
Nonresponse &Measurement Error
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The Use of ExcelThe Use of ExcelThe Use of ExcelThe Use of Excel
Microsoft Excel 97 Windows/ 98 MacMicrosoft Excel 97 Windows/ 98 Mac Graduate Lab has Excel 97Graduate Lab has Excel 97 Our analyses done with Excel 97/98Our analyses done with Excel 97/98 Data disk with book for practiceData disk with book for practice Study Chapter 1SStudy Chapter 1S Review update to 1S for Excel 97Review update to 1S for Excel 97
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Objectives:Objectives:Data & ExcelData & ExcelObjectives:Objectives:
Data & ExcelData & Excel Define statisticsDefine statistics Distinguish descriptive & inferential Distinguish descriptive & inferential
statisticsstatistics Summarize the sources of dataSummarize the sources of data Describe the types of data & scalesDescribe the types of data & scales Explain the types of samplesExplain the types of samples Describe survey process & errorsDescribe survey process & errors Discuss the use of ExcelDiscuss the use of Excel
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Course ObjectivesCourse ObjectivesCourse ObjectivesCourse Objectives
Master key terminology for data analysisMaster key terminology for data analysis Understand key statistical conceptsUnderstand key statistical concepts Master the selection of appropriate Master the selection of appropriate
statistical toolsstatistical tools Master the use of Excel for the Master the use of Excel for the
calculation of statisticscalculation of statistics Master the ability to interpret and explain Master the ability to interpret and explain
the meaning of statistical findingsthe meaning of statistical findings Have funHave fun