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A Practical Guide to Data Mining for Business and Industry

by: Ahlemeyer-stubbe, Andrea; Coleman, Shirley

A Practical Guide to Data Mining for Business and Industry

by: Ahlemeyer-stubbe, Andrea; Coleman, Shirley

ISBN 13:
9781119977131
ISBN 10:
1119977134
Edition: 1st
Format: Hardcover
Copyright: 05/12/2014
Publisher: Wiley

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A Practical Guide to Data Mining for Business and Industry > ISBN13: 9781119977131

Summary

Data mining is well on its way to becoming a recognized discipline in the overlapping areas of IT, statistics, machine learning, and AI. Practical Data Mining for Business presents a user-friendly approach to data mining methods, covering the typical uses to which it is applied. The methodology is complemented by case studies to create a versatile reference book, allowing readers to look for specific methods as well as for specific applications. The book is formatted to allow statisticians, computer scientists, and economists to cross-reference from a particular application or method to sectors of interest.

Author Biography

Andrea Ahlemeyer-Stubbe, Director Strategic Analytics, DRAFTFCB München GmbH, Germany

Shirley Coleman, Principal Statistician, Industrial Statistics Research Unit, School of Maths and Statistics, Newcastle University, UK

Glossary of terms xii

Part I Data Mining Concept 1

1 Introduction 3

1.1 Aims of the Book 3

1.2 Data Mining Context 5

1.2.1 Domain Knowledge 6

1.2.2 Words to Remember 7

1.2.3 Associated Concepts 7

1.3 Global Appeal 8

1.4 Example Datasets Used in This Book 8

1.5 Recipe Structure 11

1.6 Further Reading and Resources 13

2 Data Mining Definition 14

2.1 Types of Data Mining Questions 15

2.1.1 Population and Sample 15

2.1.2 Data Preparation 16

2.1.3 Supervised and Unsupervised Methods 16

2.1.4 Knowledge-Discovery Techniques 18

2.2 Data Mining Process 19

2.3 Business Task: Clarification of the Business Question behind the Problem 20

2.4 Data: Provision and Processing of the Required Data 21

2.4.1 Fixing the Analysis Period 22

2.4.2 Basic Unit of Interest 23

2.4.3 Target Variables 24

2.4.4 Input Variables/Explanatory Variables 24

2.5 Modelling: Analysis of the Data 25

2.6 Evaluation and Validation during the Analysis Stage 25

2.7 Application of Data Mining Results and Learning from the Experience 28

Part II Data Mining Practicalities 31

3 All about data 33

3.1 Some Basics 34

3.1.1 Data, Information, Knowledge and Wisdom 35

3.1.2 Sources and Quality of Data 36

3.1.3 Measurement Level and Types of Data 37

3.1.4 Measures of Magnitude and Dispersion 39

3.1.5 Data Distributions 41

3.2 Data Partition: Random Samples for Training, Testing and Validation 41

3.3 Types of Business Information Systems 44

3.3.1 Operational Systems Supporting Business Processes 44

3.3.2 Analysis-Based Information Systems 45

3.3.3 Importance of Information 45

3.4 Data Warehouses 47

3.4.1 Topic Orientation 47

3.4.2 Logical Integration and Homogenisation 48

3.4.3 Reference Period 48

3.4.4 Low Volatility 48

3.4.5 Using the Data Warehouse 49

3.5 Three Components of a Data Warehouse: DBMS, DB and DBCS 50

3.5.1 Database Management System (DBMS) 51

3.5.2 Database (DB) 51

3.5.3 Database Communication Systems (DBCS) 51

3.6 Data Marts 52

3.6.1 Regularly Filled Data Marts 53

3.6.2 Comparison between Data Marts and Data Warehouses 53

3.7 A Typical Example from the Online Marketing Area 54

3.8 Unique Data Marts 54

3.8.1 Permanent Data Marts 54

3.8.2 Data Marts Resulting from Complex Analysis 56

3.9 Data Mart: Do’s and Don’ts 58

3.9.1 Do’s and Don’ts for Processes 58

3.9.2 Do’s and Don’ts for Handling 58

3.9.3 Do’s and Don’ts for Coding/Programming 59

4 Data Preparation 60

4.1 Necessity of Data Preparation 61

4.2 From Small and Long to Short and Wide 61

4.3 Transformation of Variables 65

4.4 Missing Data and Imputation Strategies 66

4.5 Outliers 69

4.6 Dealing with the Vagaries of Data 70

4.6.1 Distributions 70

4.6.2 Tests for Normality 70

4.6.3 Data with Totally Different Scales 70

4.7 Adjusting the Data Distributions 71

4.7.1 Standardisation and Normalisation 71

4.7.2 Ranking 71

4.7.3 Box–Cox Transformation 71

4.8 Binning 72

4.8.1 Bucket Method 73

4.8.2 Analytical Binning for Nominal Variables 73

4.8.3 Quantiles 73

4.8.4 Binning in Practice 74

4.9 Timing Considerations 77

4.10 Operational Issues 77

5 Analytics 78

5.1 Introduction 79

5.2 Basis of Statistical Tests 80

5.2.1 Hypothesis Tests and P Values 80

5.2.2 Tolerance Intervals 82

5.2.3 Standard Errors and Confidence Intervals 83

5.3 Sampling 83

5.3.1 Methods 83

5.3.2 Sample Sizes 84

5.3.3 Sample Quality and Stability 84

5.4 Basic Statistics for Pre-analytics 85

5.4.1 Frequencies 85

5.4.2 Comparative Tests 88

5.4.3 Cross Tabulation and Contingency Tables 89

5.4.4 Correlations 90

5.4.5 Association Measures for Nominal Variables 91

5.4.6 Examples of Output from Comparative and Cross Tabulation Tests 92

5.5 Feature Selection/Reduction of Variables 96

5.5.1 Feature Reduction Using Domain Knowledge 96

5.5.2 Feature Selection Using Chi-Square 97

5.5.3 Principal Components Analysis and Factor Analysis 97

5.5.4 Canonical Correlation, PLS and SEM 98

5.5.5 Decision Trees 98

5.5.6 Random Forests 98

5.6 Time Series Analysis 99

6 Methods 102

6.1 Methods Overview 104

6.2 Supervised Learning 105

6.2.1 Introduction and Process Steps 105

6.2.2 Business Task 105

6.2.3 Provision and Processing of the Required Data 106

6.2.4 Analysis of the Data 107

6.2.5 Evaluation and Validation of the Results (during the Analysis) 108

6.2.6 Application of the Results 108

6.3 Multiple Linear Regression for use when Target is Continuous 109

6.3.1 Rationale of Multiple Linear Regression Modelling 109

6.3.2 Regression Coefficients 110

6.3.3 Assessment of the Quality of the Model 111

6.3.4 Example of Linear Regression in Practice 113

6.4 Regression when the Target is not Continuous 119

6.4.1 Logistic Regression 119

6.4.2 Example of Logistic Regression in Practice 121

6.4.3 Discriminant Analysis 126

6.4.4 Log-Linear Models and Poisson Regression 128

6.5 Decision Trees 129

6.5.1 Overview 129

6.5.2 Selection Procedures of the Relevant Input Variables 134

6.5.3 Splitting Criteria 134

6.5.4 Number of Splits (Branches of the Tree) 135

6.5.5 Symmetry/Asymmetry 135

6.5.6 Pruning 135

6.6 Neural Networks 137

6.7 Which Method Produces the Best Model? A Comparison of Regression, Decision Trees and Neural Networks 141

6.8 Unsupervised Learning 142

6.8.1 Introduction and Process Steps 142

6.8.2 Business Task 143

6.8.3 Provision and Processing of the Required Data 143

6.8.4 Analysis of the Data 145

6.8.5 Evaluation and Validation of the Results (during the Analysis) 147

6.8.6 Application of the Results 148

6.9 Cluster Analysis 148

6.9.1 Introduction 148

6.9.2 Hierarchical Cluster Analysis 149

6.9.3 K-Means Method of Cluster Analysis 150

6.9.4 Example of Cluster Analysis in Practice 151

6.10 Kohonen Networks and Self-Organising Maps 151

6.10.1 Description 151

6.10.2 Example of SOMs in Practice 152

6.11 Group Purchase Methods: Association and Sequence Analysis 155

6.11.1 Introduction 155

6.11.2 Analysis of the Data 157

6.11.3 Group Purchase Methods 158

6.11.4 Examples of Group Purchase Methods in Practice 158

7 Validation and Application 161

7.1 Introduction to Methods for Validation 161

7.2 Lift and Gain Charts 162

7.3 Model Stability 164

7.4 Sensitivity Analysis 167

7.5 Threshold Analytics and Confusion Matrix 169

7.6 ROC Curves 170

7.7 Cross-Validation and Robustness 171

7.8 Model Complexity 172

Part III Data Mining in Action 173

8 Marketing: Prediction 175

8.1 Recipe 1: Response Optimisation: to Find and Address the Right Number of Customers 176

8.2 Recipe 2: To Find the x% of Customers with the Highest Affinity to an Offer 186

8.3 Recipe 3: To Find the Right Number of Customers to Ignore 187

8.4 Recipe 4: To Find the x% of Customers with the Lowest Affinity to an Offer 190

8.5 Recipe 5: To Find the x% of Customers with the Highest Affinity to Buy 191

8.6 Recipe 6: To Find the x% of Customers with the Lowest Affinity to Buy 192

8.7 Recipe 7: To Find the x% of Customers with the Highest Affinity to a Single Purchase 193

8.8 Recipe 8: To Find the x% of Customers with the Highest Affinity to Sign a Long-Term Contract in Communication Areas 194

8.9 Recipe 9: To Find the x% of Customers with the Highest Affinity to Sign a Long-Term Contract in Insurance Areas 196

9 Intra-Customer Analysis 198

9.1 Recipe 10: To Find the Optimal Amount of Single Communication to Activate One Customer 199

9.2 Recipe 11: To Find the Optimal Communication Mix to Activate One Customer 200

9.3 Recipe 12: To Find and Describe Homogeneous Groups of Products 206

9.4 Recipe 13: To Find and Describe Groups of Customers with Homogeneous Usage 210

9.5 Recipe 14: To Predict the Order Size of Single Products or Product Groups 216

9.6 Recipe 15: Product Set Combination 217

9.7 Recipe 16: To Predict the Future Customer Lifetime Value of a Customer 219

10 Learning from a Small Testing Sample and Prediction 225

10.1 Recipe 17: To Predict Demographic Signs (Like Sex, Age, Education and Income) 225

10.2 Recipe 18: To Predict the Potential Customers of a Brand New Product or Service in Your Databases 236

10.3 Recipe 19: To Understand Operational Features and General Business Forecasting 241

11 Miscellaneous 244

11.1 Recipe 20: To Find Customers Who Will Potentially Churn 244

11.2 Recipe 21: Indirect Churn Based on a Discontinued Contract 249

11.3 Recipe 22: Social Media Target Group Descriptions 250

11.4 Recipe 23: Web Monitoring 254

11.5 Recipe 24: To Predict Who is Likely to Click on a Special Banner 258

12 Software and Tools: A Quick Guide 261

12.1 List of Requirements When Choosing a Data Mining Tool 261

12.2 Introduction to the Idea of Fully Automated Modelling (FAM) 265

12.2.1 Predictive Behavioural Targeting 265

12.2.2 Fully Automatic Predictive Targeting and Modelling Real-Time Online Behaviour 266

12.3 FAM Function 266

12.4 FAM Architecture 267

12.5 FAM Data Flows and Databases 268

12.6 FAM Modelling Aspects 269

12.7 FAM Challenges and Critical Success Factors 270

12.8 FAM Summary 270

13 Overviews 271

13.1 To Make Use of Official Statistics 272

13.2 How to Use Simple Maths to Make an Impression 272

13.2.1 Approximations 272

13.2.2 Absolute and Relative Values 273

13.2.3 % Change 273

13.2.4 Values in Context 273

13.2.5 Confidence Intervals 274

13.2.6 Rounding 274

13.2.7 Tables 274

13.2.8 Figures 274

13.3 Differences between Statistical Analysis and Data Mining 275

13.3.1 Assumptions 275

13.3.2 Values Missing Because ‘Nothing Happened’ 275

13.3.3 Sample Sizes 276

13.3.4 Goodness-of-Fit Tests 276

13.3.5 Model Complexity 277

13.4 How to Use Data Mining in Different Industries 277

13.5 Future Views 283

Bibliography 285

Index 296

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