Apply statistics to your everyday life. Statistics and Data Analysis for Social Science helps students to build a strong foundational understanding of statistics by providing clarity around when and why statistics useful. Rather than focusing on the “how to” of statistics, author Eric J. Krieg simplifies the complexity of statistical calculations by introducing only what is necessary to understanding each concept. Every chapter is written around and applied to a different social problem or issues–enabling students to broaden their imagination about the statistical “tools” that can be used to make sense of our world and, maybe, to make the world a better place. In addition to updating all the tables and examples with new data, the Second Edition has replaced the section on SPSS with three new sets of exercises at the end of each chapter:  1. Chapter Exercises for students complete during their reading and bring questions to class,  2. In-Class Exercises that focus on the areas that students struggled with during their reading, and  3.  Homework Exercises that can be assigned if students need extra practice with the concepts.

# Measures of Dispersion

### Measures of Dispersion

Measures of Dispersion

### Introduction

According to the 2016 General Social Survey (GSS), Americans have completed an average of 13.74 years of education. Of course, this does not mean that each and every American has exactly 13.74 years of education; some have more and some have less. The 2016 GSS also tells us that 11.5% of the U.S. population has less than a high school diploma and that 18.7% has a bachelor’s degree, but these ordinal measures tell us very little about how cases are distributed around the average of 13.74 years of education. Do most Americans have just about 13 to 14 years? Or are there lots of people with 10 years and lots of people with 16 years?

These are questions ...