1. Chapter 11 Displaying Distributions with Graphs

2. Turning Quantitative Data Into Information u Shape of the data u Center of the data u Spread of the data (Variability)

3. Weight Data STAT 051 Class Survey -- Spring, 1997 – University of Vermont

4. Weight Data: Frequency Table * Left endpoint is included in the group, right endpoint is not.

5. Weight Data: Histogram 100120140160180200220240260280 Weight * Left endpoint is included in the group, right endpoint is not.

6. Shape of the Data u Symmetric –bell shaped –other symmetric shapes u Asymmetric –skewed to the right –skewed to the left u Unimodal, bimodal, multimodal

7. Symmetric Distributions Bell-Shaped

8. Symmetric Distributions Mound-Shaped

9. Symmetric Distributions Uniform

10. Asymmetric Distributions Skewed to the Left

11. Asymmetric Distributions Skewed to the Right

12. Outliers u Extreme values, far from the rest of the data. u May occur naturally u May occur due to error in recording u May occur due to error in measuring u Observational unit may be fundamentally different

13. Number of Books Read for Pleasure