JMP® Means Business: Statistical Models for Management

Chapter 9. Comparing Two Means

• 9.1 Introduction 224

  • 9.1.1 Hypotheses for Comparing Two Means 224

  • 9.1.2 Paired t-Test versus Two-Sample t-Test 225

• 9.2 Two-Sample t-test 227

  • 9.2.1 Detail Example: Comparing Processor Speeds of Two Brands 228

  • 9.2.2 Two-Sample t-test in JMP 230

  • 9.2.3 Interpretation of Two-Sample Results 232

• 9.3 Paired t-test 233

  • 9.3.1 Detail Example: Advertising Effect in Test Markets 234

  • 9.3.2 Paired t-test in JMP 236

  • 9.3.3 Interpretation of Paired t-test Results 237

• 9.4 Paired t-test versus Two-Sample t-test on the Same Data 238

  • 9.4.1 Example: Abrasion Resistance 238

  • 9.4.2 Summary of Differences between the Paired and Two-Sample t-test 240

• 9.5 Summary 241

9.1 Introduction

Many business problems require the comparison of two processes or two populations. ...