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Descriptive Statistics: Tabular and Graphical Presentations

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Descriptive Statistics: Tabular and Graphical Presentations

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    1. Descriptive Statistics: Tabular and Graphical Presentations Summarizing Qualitative Data Summarizing Quantitative Data

    2. Summarizing Qualitative Data Frequency Distribution Relative Frequency Distribution Cumulative Frequency Cumulative Relative Frequency Bar Graph Pie Chart

    3. Example: Marada Inn Guests staying at Marada Inn were asked to rate the quality of their accommodations as being excellent, above average, average, below average, or poor. The ratings provided by a sample of 20 guests are:

    8. Summarizing Quantitative Data Frequency Distribution Relative Frequency Distributions Histogram Cumulative Distributions

    9. Example: Hudson Auto Repair

    11. Frequency Distribution Guidelines for Selecting Number of Classes

    12. Frequency Distribution Guidelines for Selecting Width of Classes

    13. Frequency Distribution For Hudson Auto Repair, if we choose six classes:

    14. Relative Frequency Distribution

    15. Cumulative Distributions Hudson Auto Repair

    16. Histogram

    17. Symmetric Left tail is the mirror image of the right tail Examples: heights and weights of people Histogram

    18. Histogram Moderately Skewed Left A longer tail to the left Example: exam scores

    19. Moderately Right Skewed A Longer tail to the right Example: housing values Histogram

    20. Histogram Highly Skewed Right A very long tail to the right Example: executive salaries

    21. Scatter Diagram A Positive Relationship

    22. Scatter Diagram A Negative Relationship

    23. Scatter Diagram No Apparent Relationship

    24. Example: Panthers Football Team Scatter Diagram The Panthers football team is interested in investigating the relationship, if any, between interceptions made and points scored.

    25. Scatter Diagram

    26. Tabular and Graphical Procedures

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