1. Chapter 2 2-1 Introduction 2-2 Organizing Data
2-3 Histograms, Frequency Polygons, and Ogives
2-4 Other types of Graphs
2-5 Summary

2. 2-3 Histograms, Frequency Polygons, and Ogives (cont)
Distribution shapes
Bell- shaped
Uniform
J-shaped
Reverse j-shaped
Right-skewed
Left-skewed
Bimodal u-shaped

3. Bell Shaped

4. Uniform

5. J Shaped

6. Bimodal u-shaped

7. Skewed

8. 2-3 Histograms, Frequency Polygons, and Ogives (cont)
Cumulative frequency
Ogive
Relative frequency graph

9. Frequency Polygon

10. Ogive

11. Relative Frequency

12. 2-4 Other Types of Graphs
Pareto charts
Time series graphs
Pie charts

13. 2-4 Other Types of Graphs (Cont)
Pareto charts
Represents frequency distributions for a categorical variable
Frequencies are displayed by heights from least to greatest

14. Pareto
 power law probability distribution that is used in description of social, scientific, geophysical, actuarial, and many other types of observable phenomena.

15. Pareto

16. 2-4 Other Types of Graphs (Cont)
Time series graphs
Represent data that occur over a specific period of time

17. Time series

18. 2-4 Other Types of Graphs (Cont)
Pie Graph
A circle that is divided into sections or wedges according to the percentage of frequencies in each category of the distribution.

19. Pie Charts