Book Image

CompTIA Data+: DAO-001 Certification Guide

By : Cameron Dodd
Book Image

CompTIA Data+: DAO-001 Certification Guide

By: Cameron Dodd

Overview of this book

The CompTIA Data+ certification exam not only helps validate a skill set required to enter one of the fastest-growing fields in the world, but also is starting to standardize the language and concepts within the field. However, there’s a lot of conflicting information and a lack of existing resources about the topics covered in this exam, and even professionals working in data analytics may need a study guide to help them pass on their first attempt. The CompTIA Data + (DAO-001) Certification Guide will give you a solid understanding of how to prepare, analyze, and report data for better insights. You’ll get an introduction to Data+ certification exam format to begin with, and then quickly dive into preparing data. You'll learn about collecting, cleaning, and processing data along with data wrangling and manipulation. As you progress, you’ll cover data analysis topics such as types of analysis, common techniques, hypothesis techniques, and statistical analysis, before tackling data reporting, common visualizations, and data governance. All the knowledge you've gained throughout the book will be tested with the mock tests that appear in the final chapters. By the end of this book, you’ll be ready to pass the Data+ exam with confidence and take the next step in your career.
Table of Contents (24 chapters)
1
Part 1: Preparing Data
7
Part 2: Analyzing Data
13
Part 3: Reporting Data
19
Part 4: Mock Exams

Common Visualizations

This chapter is all about common visualizations, which are important tools for every data analyst. As we discussed in the previous chapter, data analysts need to be able to communicate results to other people. They say a picture is worth a thousand words and it is true that data visualization is often a more effective form of communication than just reading out the numbers of your results. Almost every report you create will have at least one visualization, often more. There are all kinds of ways to depict your data, but in this chapter, we will cover the most common types, which will also be the types you need to know for the exam.

Here, we will discuss infographics and word clouds. Then, we will move on to bar charts and bar chart variations. Next, we will cover charts with lines, circles, and dots. Finally, we will wrap it up with mapping visualizations. In the exam, you will be asked both what kind of chart a given illustration depicts and what kind of...