Chapter 8

Introduction to Descriptive Statistics


This chapter presents an introduction to descriptive statistics. It discusses such topics as measures of central tendency, which includes the mean, mode and median; measures of spread, which include the range, interquartile range, variance and standard deviation; and graphical displays, which include dot plot, histogram, bar chart, pie chart, and box and whiskers. Finally, the chapter discusses shapes of frequency distributions, including the skewness and the peakedness.




interquartile range


skewness coefficient


pie chart

box and whiskers

8.1 Introduction

The term “statistics” can be used in the singular sense or plural sense. In the singular ...

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