Introduction

Author(s)

David M. Lane

Prerequisites

Percentiles

Just as a picture is worth a thousand words, a well-drawn graph can be worth thousands of numbers. Graphs are very effective for describing distributions, identifying patterns in data, and comparing data from various groups.

Choosing what to graph and how to graph it is often the most important part of a statistical analysis. Even sophisticated statistical analyses are often less revealing than a well-constructed graph.

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