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Problem Solving and Data Analysis Using Minitab

A Clear and Easy Guide to Six Sigma Methodology

Problem Solving and Data Analysis Using Minitab by Rehman M. Khan
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Acknowledgements ix

1 Introduction 1

2 Minitab Navigation 6

2.1 Windows 6

2.2 Dropdown Menus 8

2.3 Importing Data 13

2.4 Column Formats 15

2.5 The Calculator 18

2.6 Basic Graphs 20

2.7 Adding Detail to Graphs 25

2.8 Saving Graphs 27

2.9 Dotplots 28

2.10 Using the Brush 32

2.11 Boxplots 34

2.12 Bar Charts 40

2.13 The Layout Tool 42

2.14 Producing Graphs with the Assistant 44

2.15 Producing Reports 46

2.16 Creating a New Project/Worksheet Button 49

3 Basic Statistics 50

3.1 Types of Data 50

3.2 Central Location 50

3.3 Dispersion 51

3.4 Descriptive Statistics 52

3.5 Inferential Statistics 59

3.6 Confidence Intervals 60

3.7 Normal Distribution 62

3.8 Deviations from Normality 63

3.9 Central Limit Theorem 70

4 Hypothesis Testing 71

4.1 The Problem Statement 72

4.2 Null and Alternate Hypotheses 72

4.3 Establishing the Risks 73

4.4 Power and Sample Size 76

4.5 Conducting the Test and Evaluating the Results 80

4.6 One Sample t Test 81

4.7 Paired t Test 105

4.8 Two Variance Test 118

4.9 Two Sample t Test 130

5 Analysis of Variance 150

5.1 How ANOVA Works 150

5.2 One Way ANOVA (Classic) 152

5.3 One Way ANOVA with the Assistant 164

5.4 ANOVA General Linear Model 192

6 Measurement System Analysis 209

6.1 The Importance of Measurement Systems 209

6.2 How Measurement Systems Affect Data 209

6.3 Analysing the Appropriate Systems 210

6.4 Types of Measurement Systems Error 211

6.5 Measurement Systems Toolbox 213

6.6 Type 1 Gage Study 214

6.7 Gage Repeatability and Reproducibility Studies 217

6.8 Create Gage R&R Study Worksheet 219

6.9 Gage R&R (Crossed) 221

6.10 Gage R&R Crossed Studies 221

6.11 Gage R&R (Crossed) Study 222

6.12 Gage R&R (Nested) 247

6.13 Gage Bias and Linearity Study 255

7 Statistical Process Control 261

7.1 The Origins of Statistical Process Control 261

7.2 Common Cause and Special Cause Variation 262

7.3 Detection Rules for Special Causes 263

7.4 False Alarms 266

7.5 When Should We Use SPC Charts? 267

7.6 Subgrouping 268

7.7 The Appropriate Chart 268

7.8 The I-MR Chart 269

7.9 The Xbar-R Chart 291

7.10 The Xbar-S Chart 299

7.11 SPC Exercise 307

7.12 The I-MR-R/S Chart 310

8 Process Capability 313

8.1 The Basics of Process Capability 313

8.2 Short Term and Overall Capability 318

8.3 Capability Analysis for Normal Data 319

8.4 Capability Analysis for Non Normal Data 329

8.5 Capability Comparison using the Assistant 340

9 Correlation and Regression 344

9.1 What are Correlation and Regression? 344

9.2 Correlation 346

9.3 Multiple Correlations 349

9.4 Introduction to Regression 354

9.5 Single Predictor Regression 355

9.6 Introduction to Multiple Predictor Regression 372

9.7 Multiple Predictor Regression 373

9.8 Predictor Selection Procedure 396

9.9 Nonlinear Regression 400

10 Design of Experiment 407

10.1 Why Use Design of Experiment? 407

10.2 Types of DOE 407

10.3 DOE Terminology 408

10.4 Two Level Factorial Designs 412

10.5 Fractional Factorial Designs 439

11 Help 456

11.1 Help Overview 456

11.2 Help! Help! 457

11.3 Tutorials 461

11.4 StatGuide 463

11.5 Methods and Formulas 464

11.6 Meet Minitab 466

11.7 Help on the Web 466

11.8 Help on the Web and Datasets 468

11.9 Datasets 469

Index 471

Wiley; January 2013
488 pages; ISBN 9781118307526
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Title: Problem Solving and Data Analysis Using Minitab
Author: Rehman M. Khan
 
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