Even You Can Learn Statistics A Guide for Everyone Who Has Ever Been Afraid of Statistics

Chapter 3. Descriptive Statistics for Numerical Variables

• 3.1 Measures of Central Tendency

• 3.2 Measures of Variation

• 3.3 Shape of Distributions

• Important Equations

• One-Minute Summary

• Test Yourself

Among the most important summarizing activities of descriptive statistics are those statistical methods that help measure properties of a numerical variable. Reading this chapter will allow you to learn about some of the methods used to identify the properties of central tendency, variation, and shape.

Measures of Central Tendency

Because the data values of most numerical variables show a tendency to group around a specific value, statisticians use a set of methods, collectively known as measures of central tendency, to help identify the general properties of ...