Chapter 3- Displaying and Describing Categorical Data

This book is called Stats: Data and Models by De Veaux, Velleman, and Bock. This book was published by Pearson Education. This book is geared towards the student who wants to study mathematics; data and models.

This book is clear and accessible for the student looking to learn how to read and write about statistical data. Statistics help us understand the world. Math is a discipline that takes hard work and dedication to learn. You use statistics in just about any information gathering moment of your life. This book will help organized and teach you what and how to complete that task.
This book is designed to engage the reader so that they actually read the text. This will hopefully allow me to interpret it in a way that I can reiterate it to you and build some dialog on the work. This book also comes with a CD-Rom that will allow the student to put more effort into learning the techniques.
This book has 31 short, focused chapters. A TI-83/84 Plus or TI-89 calculator is a good tool to have handy when studying math.

Chapter 3- Displaying and Describing Categorical Data

When you work with Data Analysis it is best to make a picture of what the information is telling you.

To make a picture of data, the first thing we have to do is to make piles.

A frequency table records the totals and the category name. When I pick lottery numbers, I work on it by using frequency tables.
To find the proportion of the data in each category

• divide the counts by the total number of cases
• multiply it by 100 to find the percentage

This is how you can also create a relative frequency table by showing the percentage of the totals.

The best data displays observe a fundamental principle of graphing data called the area principle. The area principle says that the area occupied by a part of the graph should correspond to the magnitude of the value it responds.

Bar charts and pie charts are a few charts you can make when analyzing data.
A contingency table shows how the individuals are distributed along each variable, contingent on the value of the other variable.

Source Code

Work Cited

De Veaux, Richard D.

Stats: data and models/ Richard D. De Veaux, Paul F. Velleman, David E. Bock. –2nd ed.

p. cm.

Includes index.

ISBN 0-321-43379-3

1.	Statistics. 2. Mathematical statistics. I. Velleman, Paul F., 1949- II. Bock, David E. III. Title.

QA276.12.D417 2008

519.5 –dc22

ISBN-13 978-0-321-43379-4                                    ISBN- 10 0-321-43379-3

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