Chapter Introduction 2-2 Organizing Data

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Presentation transcript:

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

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

Bell Shaped

Uniform

J Shaped

Bimodal u-shaped

Skewed

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

Frequency Polygon

Ogive

Relative Frequency

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

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

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

Pareto

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

Time series

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.

Pie Charts