CHAPTER 1

Overview and Importance of Visual Representation

Introduction

Graphs and charts are visual representation of data. They provide a powerful means of summarizing and presenting data in a way that most people find easier to comprehend. Charts and graphs enable us to see the main features or characteristics of the data. They not only enable us to present the numerical findings of a study, but also provide the shape and pattern of the data, which is critical in data analysis and decision making.

It is said that a picture is worth a thousand words; this is particularly true when a large set of data is effectively presented using charts and graphs that quickly reveal important features. Visual displays of the data are easily recognizable and ...

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