Chapter 3. Describing Data from a Single Variable

  • 3.1 Introduction 54

    • 3.1.1 Graphs for Continuous Data 54

    • 3.1.2 Numerical Summaries for Continuous Data 55

    • 3.1.3 Data Descriptions for Nominal and Ordinal Data 56

  • 3.2 Example: Order Processing in an Herbal Tea Mail Order Business 57

  • 3.3 Descriptive Statistics with the JMP Distribution Platform 58

    • 3.3.1 Describing a Continuous Variable 58

    • 3.3.2 Describing a Nominal Variable 62

  • 3.4 Interpretation of Descriptive Statistics 64

    • 3.4.1 Histogram 64

    • 3.4.2 Box Plot 65

    • 3.4.3 CDF Plot 67

    • 3.4.4 Quantiles 69

    • 3.4.5 Moments 70

  • 3.5 Practical Advice and Potential Problems 71 3.5.1 Features of Good Graphs 71

    • 3.5.2 Example: Izod Impact Strength of Two Suppliers 71

    • 3.5.3 Simple Improvements to Histograms 72

    • 3.5.4 Potential Problems ...

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