## Statistical ConsultingThe motivation for this book arose from the statistical consulting course that we have taught regularly for several years. In that course, we focus on the themes: • Understanding the statistical consulting "process" • Developing effective communication skills • Obtaining experience through case studies. In reality, there is no substitute for consulting directly with a client and for this interaction to be effective, good communication skills are essential. Unfortunately, this aspect of a statistician's training is often neglected and statistics graduates have little choice but to learn these skills on the job. One of the purposes of this book is to address this need. Statistical consulting occurs in a diverse range of environments and for tackling real-life statistical problems, the statistician needs to have a strong interest in the scientific method. History itself provides the best examples for developing this interest and so we begin with a brief historical voyage in Chapter 1. There's no time like the present, of course, and in the remainder of this chapter we describe some of the environments in which statistical consulting plays a major role. A detailed discussion on verbal and written communication skills that will be required in a consulting environment is presented in Chapter 2. |

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### Contents

Introduction to Statistical Consulting | 3 |

11 History of the Scientific Method | 4 |

12 The Development of Statistics | 8 |

13 An Overview of Statistical Consulting | 11 |

14 Statistical Consulting Environments | 13 |

Communication | 27 |

21 Verbal Interaction | 28 |

22 Other Aspects of Verbal Interaction | 35 |

63 A Device to Reduce Engine Emissions | 216 |

64 Reverse Psychology | 220 |

Case Studies from Group II | 235 |

71 The Flick Tail Study | 236 |

72 Does It Have Good Taste? | 240 |

73 Expenditures in NY Municipalities | 255 |

74 Measuring Quality Time | 265 |

Case Studies from Group III | 273 |

23 How to Write Reports | 38 |

24 Basic Guidelines for Writing | 43 |

25 How to Make Effective Presentations | 46 |

26 The Importance of Quality Graphics | 50 |

Methodological Aspects | 61 |

32 Data Processing | 69 |

33 Statistical Issues | 73 |

34 Statistical Methods Used in Consulting | 80 |

35 Standard Methods | 81 |

36 General Methods | 124 |

37 Design of Experiments | 133 |

38 Statistical Software | 140 |

A Consulting Project from A to Z | 147 |

42 Financial Issues | 149 |

The First Meeting | 150 |

44 Documentation | 163 |

45 Project Analysis | 166 |

Presenting the Results | 174 |

47 The Final Report | 180 |

48 Postscript | 190 |

Case Studies | 195 |

Introduction to the Case Studies | 197 |

52 Case Study Details | 198 |

Case Studies from Group I | 203 |

61 Job Promotion Discrimination | 204 |

62 The Case of the Lost Mail | 210 |

81 A Tale of Two Thieves | 274 |

82 Plastic Explosives Detection | 285 |

83 A Market Research Study | 289 |

84 Sales of Orthopedic Equipment | 297 |

Additional Case Studies | 309 |

91 Improving Teaching | 310 |

92 Random Sampling? | 312 |

93 Left or Right? | 313 |

94 Making Horse Sense | 315 |

95 The Tall Redhead | 316 |

96 Bentleys Revenge | 317 |

97 Wear What You Like? | 318 |

98 An AIDS Study | 319 |

Resources | 321 |

A2 Datasets for Case Studies in Part II | 325 |

Statistical Software | 331 |

B2 SPLUS | 342 |

Statistical Addendum | 361 |

C1 Univariate Distributions | 362 |

C2 Multivariate Distributions | 365 |

C3 Statistical Tests | 368 |

C4 Sample Size | 372 |

References | 375 |

385 | |

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